Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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8. a motorcycle engine converts 470,000 j of chemical energy into 76,00…
16%
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read each description in the first column of the table below. if any ch…
1. Yes, Sr 2. Yes, Cl 3. Yes, Na 4. Yes, Na
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6. what is the correct minimum temperature for hot water sanitizing in …
6. B. 140°F 7. C. Clean it according to the SDS (Safety Data Sheet) instructions 8. C. Every 4 hours 9. C. Color - coding cleaning tools 10. C. The SDS (Safety Data Sheets)
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3 fill in the blank 2 points name the following compounds from question…
e. Diphosphorus heptoxide k. Thallium(I) sulfate d. $HNO_2$
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a chemist combines water and isopropanol to make a mixture with a volum…
43
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description identify and describe the following changes as either physi…
1. NaCl (Table Salt) dissolves in water: P, no new substance formed, just salt dispersed in water. 2. Milk sours: C, bacteria cause chemical reactions, new sour - tasting substanc…
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question 14 (mandatory) (1 point) a 150 g sample of protactinium - 233 …
d) about 16 days
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chemistry name: madison clarke period: 4 date: oct 9th grade: 11th do n…
A. Nucleus B. Proton C. Neutron D. Electron E. Atom F. Isotope
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the rings in the bohr model, represent the energy levels in the atom. t…
Helium: 2 Beryllium: 2,2 Potassium: 2,8,8,1
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name: ciroco cox nocti practice questions 1. what is the best way to sa…
1. C. Scrub it with hot soapy water and sanitize 2. B. Prep table 3. C. Wash, rinse, sanitize 4. B. Bleach (chlorine) 5. C. After each use or when soiled
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match the statements with either graph a or b a reactants products pote…
The reaction that has a greater activation energy: B The reaction that occurs faster: A Exothermic reaction: Both A & B
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match the numbers with the part of the energy diagram potential energy …
Energy of Reactants: 75 Energy of Products: 225 $\Delta H$: 150 Activation Energy: No correct option from given numbers
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10/9 major u1lc2 summative (25) match the unbalanced chemical equations…
Cu + MgCl₂ → CuCl₂ + Mg: 1, 1, 1, 1 Na + O₂ → Na₂O: 4, 1, 2 S₈ + O₂ → SO₃: 1, 12, 8
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for the following formula, match the definition to the numerical value:…
Al - Element Symbol 4 - Coefficient 3 - Subscript 8 - Total # of Al atoms 12 - Total # of S atoms
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the law of _____ of mass states that mass is neither _____ nor destroye…
The first blank: Conservation; The second blank: Created; The third blank: Balance
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10/9 major u1lc2 summative (25) match the following reactions to the co…
$4Al + 3O_2 ightarrow2Al_2O_3$ - synthesis $2H_2O ightarrow2H_2 + O_2$ - decomposition $Ba+MgSO_4 ightarrow BaSO_4 + Mg$ - single replacement $HCl + KOH ightarrow KCl + H_2O$ - do…
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10/9 major u1lc2 summative (25) match the example with the type of chan…
Digesting food - Chemical change Cutting up food - Physical change
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acetarsol (c₈asnh₁₀o₅) is the main ingredient in the medication used to…
1. Compound 2. 25 3. Group 15 4. Group 15 elements have 5 valence electrons and tend to gain 3 electrons to achieve a stable octet, showing non - metallic character and forming co…
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Pb^{2+}$ | $PO_{4}^{3 -}$ | $Pb_{3}(PO_{4})_{2}$ | lead(II) phosphate | | $K^{+}$ | $BrO…
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your answer is incorrect. • row 1: name of compound: your answer is cor…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $K^+$ | $SO_4^{2 - }$ | $K_2SO_4$ | potassium sulfate | | $Co^{2+}$ | $ClO^-$ | $Co(ClO)_…
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what type of print needs to be developed using a physical or chemical m…
Latent fingerprints
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text-dependent questions directions: for the following questions, choos…
1. D. Water scarcity is an issue primarily caused by humans that needs to be addressed by humans. 2. B. "In Ranipet, India, leather tanning wastes contaminate groundwater with the…
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history of mars exploration mars is the most explored planet in the sol…
1. 1970s 2. Italy 3. Yes, in the 2010s by the US 4. Answers may vary. For example, the discovery of organic matter in the 2010s by the US because it is related to the possibility …
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Pb^{2+}$ | $PO_{3}^{3 -}$ | $Pb_{3}(PO_{3})_{2}$ | Lead(II) phosphite | | $Mg^{2+}$ | $S…
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mars milestones by decade here are some of the successful mars missions…
1. 2010s, Italy 2. US, 2010s 3. Answers may vary. For example: Finding organic matter in the 2010s is interesting because it could indicate past or present life on Mars. 4. Answer…
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name______ date______ core______ chemical symbol atomic number chemical…
1. Atomic Mass 2. Luster 3. Oxidation 4. Noble Gases 5. Ductility 6. Periodic Table 7. Atomic Number 8. Insulators 9. Corrosion 10. Alkali Metals 11. Conductivity
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Ca^{2+}$ | $BrO_{3}^{-}$ | $Ca(BrO_{3})_{2}$ | calcium bromate | | $K^{+}$ | $ClO^{-}$ |…
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community, matter & changes class activity per:____ date____ chemistry …
**I. Matter and properties** | Description | P/C | Explanation | |--|--|--| | blue color | P | Can be observed without changing chemical identity | | melting point | P | Measured …
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question 9 (2 points) an element has the following natural abundances a…
20.17 amu
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Cr^{2+}$ | $CN^{-}$ | $Cr(CN)_2$ | chromium(II) cyanide | | $K^{+}$ | $BrO_{3}^{-}$ | $K…
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $NH_4^+$ | $ClO_3^-$ | $NH_4ClO_3$ | ammonium chlorate | | $Na^+$ | $IO_2^-$ | $NaIO_2$ |…
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part f. sig fig review: fill in the chart below 1) 21.3 g / 1.3 ml 2) $…
| Question | Answer without sig figs | Answer with sig figs | Units | |---|---|---|---| | 1 | 16.384615 | 16 | g/mL | | 2 | 1.818182 | 2 | g/cm³ | | 3 | 6.15 | 6.2 | cm | | 4 | 97…
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Mn^{2+}$ | $NO_{2}^{-}$ | $Mn(NO_{2})_{2}$ | Manganese(II) nitrite | | $Ca^{2+}$ | $CrO_…
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question 6 (2 points) average atomic masses listed by iupac are based o…
The percent abundances of the two isotopes are approximately 28.00% and 72.00% (rounded to two decimal places).
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which pair of elements will form an ionic bond? o n and o o k and br o …
K and Br
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | Sr²⁺ | S²⁻ | SrS | strontium sulfide | | Sr²⁺ | N³⁻ | Sr₃N₂ | strontium nitride | | Sr²⁺ …
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use the van der waals equation and the ideal gas equation to calculate …
$0.05845,0.05997$
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Cs^+$ | $I^-$ | $CsI$ | cesium iodide | | $Cs^+$ | $F^-$ | $CsF$ | cesium fluoride | | $…
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read this paragraph. then, answer the question. writing an instruction …
such as including
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multiple choice question read this paragraph. then, answer the question…
A. After
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essay writing. what is distillation as a process? describe two use of d…
Distillation is a process of separating components of a mixture based on differences in their boiling points. One use is in water purification, where water is boiled to turn it in…
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Na^+$ | $Br^-$ | $NaBr$ | sodium bromide | | $Na^+$ | $Cl^-$ | $NaCl$ | sodium chloride …
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10/9 do now draw the atomic structure of $^{15}_{7}n$
Draw a nucleus with 7 protons and 8 neutrons. Surround it with two electron - shells: the first shell has 2 electrons and the second shell has 5 electrons.
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fill in the name and empirical formula of each ionic compound that coul…
| cation | anion | empirical formula | name of compound | | ---- | ---- | ---- | ---- | | $Co^{3+}$ | $Br^{-}$ | $CoBr_{3}$ | cobalt(III) bromide | | $Co^{2+}$ | $Br^{-}$ | $CoBr_…
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day 5 (10/9) 1. write the name for se₃cl₉ 2. write the chemical formula…
1. Triselenium nonachloride 2. $K_2SO_4$ 3. $Pb_3PO_4$
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what is the correct order of processes in the accretion of planetesimal…
Atoms and molecules are added to dust grain, masses of matter form around dust grain, and masses of matter collide.
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what is the volume of 80.0 g of ether if the density of ether is 0.70 g…
$1.1\times 10^{2}$ (corresponding to the second option)
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1. place the molecules in the list in order with smallest molecules at …
1. water molecule 2. oxygen molecule 3. carbon dioxide molecule 4. amino acid molecule 5. glucose molecule 6. starch molecule 7. protein molecule
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label a diagram of a water molecule: hydrogen atoms, oxygen atom, bond …
1. Oxygen is more electronegative than hydrogen, creating polar O - H bonds and a bent shape gives an overall dipole moment. 2. Covalent bonds. 3. Allows hydrogen - bonding, leadi…
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periodic table element labeling label an element box with: atomic numbe…
1. 7 2. 6 3. 12
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label a diagram of an atom with: proton, neutron, electron, nucleus, el…
1. Proton 2. In the nucleus 3. Mass number - Atomic number
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day 5 (10/9) 1. write the name for se₃cl₉ 2. write the chemical formula…
1. triselenium nonachloride 2. $K_2SO_4$ 3. $Pb_3PO_4$
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name: _ teacher: _ date: _ q1 chemistry: u2l15 electron config day 5 pr…
1. Neutral atom of cobalt: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{7}$ 2. Chlorine ion with a charge of - 1: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}$ 3. Neutral atom of iodine (abbreviat…
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add or subtract a positive integer on a number line 1. ms. howard buys …
$775$ ### 2.
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quiz 5 question 1 write a balanced chemical equation for this scenario:…
Question 1: $Zn + 2HCl ightarrow ZnCl_{2}+H_{2}$ Question 2: $2Al + Fe_{2}O_{3} ightarrow Al_{2}O_{3}+2Fe$ Question 3: $2Ga + 3S ightarrow Ga_{2}S_{3}$ Question 4: $BeCO_{3} ighta…
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biochemistry 141 homework 10 (chapter 9) study polyatomic ions before y…
1. Barium oxide 2. Diphosphorus pentasulfide 3. Titanium(III) nitrite 4. Nickel(II) nitride 5. Strontium cyanide
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give the formulas from the names __1__ gold (iii) nitrite __2__ gold (i…
1. B. $Au(NO_{2})_{3}$ 2. J. $Au_{2}S$ 3. Q. $Au(HSO_{4})_{3}$ 4. H. $Au(H_{2}PO_{4})_{3}$
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name the following compounds __1__ cf₄ __2__ ba₃(po₃)₂ __3__ cu(hso₃)₂ …
1. N. carbon tetrafluoride 2. I. barium phosphite 3. H. copper(II) hydrogen sulfite 4. C. diphosphorus tetrasulfide
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name the following 1 mo(cn)4 2 mo3(po4)4 3 mo2(hpo4)3 4 mo(h2po4)3 a. m…
1. D. molybdenum (IV) cyanide 2. B. molybdenum (IV) phosphate 3. F. molybdenum (III) hydrogen phosphate 4. H. molybdenum (III) dihydrogen phosphate
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name the following 1 na₂so₃ 2 nahso₄ 3 fe₂(so₃)₃ 4 fes a. iron sulfide …
1. J. sodium sulfite 2. E. sodium hydrogen sulfate 3. H. iron(III) sulfite 4. B. iron(II) sulfide
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name the following ions __1__ s⁻² __2__ s⁻¹ __3__ so₃⁻² __4__ so₄⁻² __5…
1. G. sulfide 2. A. doesn't exist 3. C. sulfite 4. E. sulfate 5. A. doesn't exist 6. D. hydrogen sulfite 7. B. not an ion 8. B. not an ion 9. A. doesn't exist
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question 4 (2 points) name the following compounds __1__ fe₂o₃ __2__ fe…
1. K. iron (III) oxide 2. L. iron (II) oxide 3. F. gold (I) oxide 4. E. gold (III) oxide
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name the following compounds __a__ h₂o __b__ f₂o __c__ n₂o₄ __d__ na₂o …
A. H. dihydrogen monoxide B. D. difluorine oxide C. E. dinitrogen tetroxide D. A. sodium oxide
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indicate if the process is oxidation, reduction, both, or neither __1__…
1. A. oxidation 2. B. reduction 3. D. neither 4. C. oxidation/reduction 5. A. oxidation 6. B. reduction 7. C. oxidation/reduction
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use the periodic table to give the possible oxidation states for each e…
Fr: B. 1 Pb: D. 2, H. 4 S: E. -2, H. 4, L. 6 F: C. -1
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give the noble gas electron configuration for bohrium, element 107. __1…
[Rn] \(7s^2\) \(5f^{14}\) \(6d^5\) So the blanks should be filled as follows: 1. Rn 2. \(s^2\) 3. \(f^{14}\) 4. \(d^5\)
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give the noble gas electron configuration for rhenium, element 75. __1_…
[Xe] 6s2 4f14 5d5
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give the noble gas electron configuration for the only cadmium ion (ele…
[Kr] 5s<sup>0</sup> 4d<sup>10</sup>
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give the noble gas electron configuration for the only cadmium ion (ele…
[Kr] 5s⁰ 4d¹⁰
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give the noble gas electron configuration for cadmium, element 48. __1_…
[Kr] $5s^{2}4d^{10}$
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give the noble gas electron configuration for cadmium, element 48. __1_…
[Kr] $5s^{2}4d^{10}$
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give the correct box associated with each subshell 1. 1s² 2. 2s¹ 3. 2p¹…
1. c 2. b 3. o 4. ee 5. ee
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indicate whether the following follow the aufbau principle __1__ 1s² 2s…
1. B. no 2. A. yes 3. A. yes 4. A. yes
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an indicator changes color in the presence of the substance it indicate…
true
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what is kinetic energy? a. the energy an object has due to its motion b…
A. the energy an object has due to its motion
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use the table to answer the question. elements with their electronegati…
B. bromine and nitrogen
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which phrase best describes electronegativity? (1 point) the number of …
the relative strength with which an element attracts electrons in a chemical bond
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based on their locations in the periodic table, which two elements are …
B. nitrogen (N) and oxygen (O)
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which statement about sodium chloride is correct? (1 point) the sodium …
The sodium atom transfers electrons to the chlorine atoms to form ionic bonds.
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which element would most likely lose electrons to form positive ions wh…
C. rubidium (Rb)
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2h₂ + 1o₂ →→ 2h₂o if you change the 2h₂ to 3h₂ molecules and balance th…
It is not possible to produce water without leftover molecules.
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which statement correctly explains why the ashes of burnt paper have le…
Some of the atoms in the paper became gases.
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one molecule of calcium oxide, cao, and one molecule of carbon dioxide,…
CaCO₃
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when iron rusts and forms iron oxide, the iron oxide has more mass than…
Iron oxide has oxygen atoms, and pure iron does not.
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the box orbital diagram corresponding to s² p³ is __1__ __2__ the box o…
1. c 2. dd 3. mm 4. ee
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the box orbital diagram corresponding to f^5 is __1__ the box orbital d…
1. ee. 2. mm.
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the box orbital diagram corresponding to d^6 is __1__ the box orbital d…
1. ee 2. yy
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what is the process of matter changing from a liquid to a gas? (1 point…
Evaporation
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the box orbital diagram corresponding to d^5 is __1__ the box orbital d…
1. ee. 2. a.
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what is the process of matter changing from a gas to a liquid? (1 point…
B. Condensation
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what is the process of matter changing from a liquid to a solid? (1 poi…
B. Crystallization
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the box orbital diagram corresponding to p³ is __1__ the box orbital di…
1. k. ↓ ↓ ↑ 2. s. ↓ ↓ ↓ ↑
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give the noble gas shortened electron configuration for se __1__ 4__2__…
1. C. Ar, J. s2, CC. d10, P. p4 2. D. Kr, J. s2, CC. d10, R. p6
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give the noble gas shortened electron configuration for hf __1__ 6__2__…
1. E. Xe, J. s2, EE. f14, U. d2 2. E. Xe, H. s0, EE. f14, S. d0
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give the noble gas shortened electron configuration for ga __1__ 4__2__…
1. C. Ar 2. J. s² 3. CC. d¹⁰ 4. M. p¹ 5. C. Ar 6. H. s⁰ 7. CC. d¹⁰ 8. L. p⁰
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give the noble gas shortened electron configuration for zr __1__ 5__2__…
1. D. Kr, J. s$^2$, U. d$^2$ 2. D. Kr, H. s$^0$, S. d$^0$
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there are 3 ways to show the electron configuration for an element or i…
1. A. He 2. J. $s^2$ 3. M. $p^5$ 4. B. Ne 5. J. $s^2$ 6. N. $p^6$
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the aufbau principle describes the order of subshells in an atom in ter…
1. Z. 5f 2. T. 6d 3. N. 7p
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the aufbau principle describes the order of subshells in an atom in ter…
Y. 4f, S. 5d, M. 6p
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the aufbau principle describes the order of subshells in an atom in ter…
1. R. 4d 2. L. 5p