Chemistry
Chemical reactions, stoichiometry, molecular structures, and element properties.
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a reaction was carried out that started with cesium, cs, plus a binary …
single displacement/replacement
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which characteristic belongs to metal elements? remains neutral easily …
easily loses electrons
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in a 1:1 ratio, which of these pairings would create an octet for each …
one sulfur atom and one calcium atom
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what do the purple - colored blocks indicate? halogens noble gases meta…
metalloids
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what do the green - colored blocks indicate? alkali metals halogens alk…
alkaline metals
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what did newlands \law of octaves\ demonstrate? every third mass had di…
Every eighth mass had similar chemical and physical properties.
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he, ne, and ar have similar chemical and physical properties. the mass …
D. Law of Triads (Dobereiner)
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what is electronegativity? the size of the atom from the nucleus to the…
the likelihood of an atom to gain an electron from another atom during bonding
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which choice ranks the atoms from lowest to highest electronegativity? …
Sn < As < S < F
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which element has the highest electronegativity? mg si cl s
C. Cl
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what type of bond tends to form when two different non - metal atoms wi…
polar bonds
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what term describes the likelihood of an atom to attract an electron du…
A. Electronegativity
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question 1 of 9 r+color is created with a choose only one best answer. …
C. Collective approach
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check all the characteristics below that describe compounds. two or mor…
two or more elements, chemically combined elements, definite proportions
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check all the characteristics below that describe elements. one type of…
one type of atom, a pure substance
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question 2 1 pts consider complete ionic versus net ionic equations. wh…
Complete ionic shows all the (aq) as ions but not (s) and (l)
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33. classify the following as a chemical change (c) or a physical chang…
33. a. P b. C c. C d. P 34. a. Compound b. Element c. Homogeneous mixture d. Compound 35. Physical properties: a, b, d, e, f, g Chemical properties: c, h 36. a. Chemical change. R…
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complete each sentence by selecting the proper word in each drop - down…
1. modality 2. unpleasant 3. intensity 4. sensory adaptation
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question 2 of 5 1 point which of the following qualities are related to…
Oxidative hair dye molecules are deposited here. It is the middle layer of the hair. Color fade is problematic when it is damaged.
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ch 16 hair color and structure quiz question 1 of 5 1 point which of th…
- Color fade is problematic when it is damaged. - It is the outer layer of the hair. - Non - oxidative dyes only color this layer.
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28. write the following numbers in standard notation: (4 pts) a. 5.01 x…
a. \(0.0501\) b. \(3102000\) ### 29.
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2 numeric 1 point calculate the number of protons and electrons in a ch…
Protons: 17, Electrons: 18
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multiple choice 1 point select the option that fills in the blanks with…
C. anion, negative
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multiple choice 1 point write the formula for cobalt (ii) phosphate cop…
C. $Co_{3}P_{2}$
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question 11 (1 point) match the group name to the group number for each…
1. c. Group 1 2. g. Group 2 3. f. Groups 3 - 12 4. d. Group 17 5. i. Group 18
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question 3 (2 points) alkali metals are in group 1 of the periodic tabl…
reactive
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1. how many electrons are present in the following elements? using the …
Carbon: 6 Chlorine: 17 Tungsten: 74 Antimony: 51 Titanium: 22 Indium: 49 Tin: 50 Calcium: 20 Copper: 29 Xenon: 54 Hydrogen: 1 Aluminum: 13 Phosphorus: 15 Barium: 56 Iodine: 53
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2. complete the table for the following elements. element number of pro…
| Element | Number of Protons | Number of Electrons | Number of Neutrons | Atomic Number | Mass Number | |---|---|---|---|---|---| | Manganese | 23 | 23 | 30 | 23 | 53 | | Sodium …
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question 8 (1 point) match each orbital with the maximum number of elec…
1. e. 2 2. f. 6 3. b. 10 4. d. 14
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contact time refers to the amount of time that the implement or surface…
C. 10 minutes
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question 4 which of the following comparisons or contrasts between ende…
Question 4: Endergonic reactions take place slowly and exergonic reactions take place quickly. Question 5: Compare their reaction rates. Question 6: None of these answer choices a…
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chemical safety is important in the salon environment. which of the fol…
D. All of the above
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spinal nerves and nerve plexuses the 31 pairs of human spinal nerves ar…
1. brain 2. spinal 3. flaccid 4. intercostal 5. plexuses
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which atom will have the lowest ionization energy? ba cs rb sr
Cs
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which atom will have the highest ionization energy? si p c n
N
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which set correctly orders the atoms from highest to lowest ionization …
Ar > S > P > Al
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which set correctly orders the atoms from lowest to highest ionization …
Te < Se < S < O
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ie decreases down a group. which element will have the smaller ie? magn…
Calcium
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what is the overall trend in ionization energy (ie) down a group on the…
Ionization energy DECREASES down a group
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ie increases across a period. which element will have the smaller ie? f…
Oxygen
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fill in the blanks in the following worksheet. please keep in mind that…
|Atomic symbol|Atomic number|Protons|Neutrons|Electrons|Atomic mass| |----|----|----|----|----|----| |B|5|5|6|5|11| |Na|11|11|13|11|24| |Ga|31|31|37|31|68| |Y|39|39|50|39|89| |Cu|…
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what is the overall trend in ionization energy (ie) across the periodic…
Ionization energy INCREASES across the period
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h₂ + o₂ => h₂o₂ na + o₂ => na₂o al(oh)₃ + h₂co₃ => al₂(co₃)₃ + h₂o al +…
Balanced equations: $2H_2 + O_2 ightarrow 2H_2O$ $4Na+O_2 ightarrow 2Na_2O$ $2Al(OH)_3 + 3H_2CO_3 ightarrow Al_2(CO_3)_3+6H_2O$ $16Al + 3S_8 ightarrow 8Al_2S_3$ $6Cs + N_2 ightarr…
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explain why there are more substances on earth than are listed on the p…
There are more substances on Earth than are listed on the periodic table because most substances on Earth are compounds or mixtures, while the periodic table only lists elements.
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3. summarize daltons atomic theory.
All matter is made of indivisible and indestructible atoms. Atoms of a given element are identical. Compounds form from combinations of different atoms. Chemical reactions are ato…
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13. you are conducting an experiment and find the volume of a substance…
C. 3.90% 14.
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13. you are conducting an experiment and find the volume of a substance…
C. 3.90% ### 14.
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13. you are conducting an experiment and find the volume of a substance…
C. 3.90% 14.
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2. define atom using your own words. atom
The smallest unit of an element that has the chemical properties of that element, composed of a nucleus with protons and neutrons and surrounded by electrons.
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question 1 6 pts which phase change releases energy? o h₂o (l) → h₂o (g…
Question 1: $H_2O(l)\to H_2O(s)$ Question 2: None of the above options are correct for an energy - absorbing process.
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4. how many significant figures are in the measurement 0.0103 ml? a. 1 …
4. B 5. A 6. D 7. D 8. B 9. A 10. D 11. C 12. A
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4. how many significant figures are in the measurement 0.0103 ml? a. 1 …
4. B. 3 5. A. aqueous solution 6. D. extensive 7. D. 98.7°F 8. B. liquid 9. A. Gold 10. D. Letting the food in your lunch box rot in your locker. 11. C. heterogeneous mixture 12. …
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both ozone and the oxygen molecules that we breathe consist of oxygen a…
$O_3$
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part i multiple choice: select the letter choice that best answers the …
A. The shirt is red 2.
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what is the primary cause of ozone depletion in the stratosphere? the h…
chemicals released at the Earth's surface
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what is the chemical formula of ozone? o₃ h₂o
O₃
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name ______________ period ______________ date ______________ study gui…
1. 118 2. Protons, neutrons, electrons 3. 2: Electron cloud; 3: Nucleus; 4: Electron 4. See the above - created table.
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26 ccc patterns recall that elements above and below each other in the …
Elements in the same group have the same number of valence electrons, which determines their chemical and many physical properties.
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25 apply concepts use the periodic table to write the noble gas configu…
[Kr]5s²
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24 using a periodic table, write the full electron configuration of bro…
1s<sup>2</sup>2s<sup>2</sup>2p<sup>6</sup>3s<sup>2</sup>3p<sup>6</sup>4s<sup>2</sup>3d<sup>10</sup>4p<sup>5</sup>
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23 ccc patterns what element has an electron configuration of 1s²2s²2p⁶…
The element is calcium (Ca) and it is in the s - block.
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22 apply concepts use the concepts of energy and stability as they rela…
1s²2s²2p⁶3s²3p⁶4s²3d⁶
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what is the most common ion charge for magnesium? +1 +2 -1 -2
+2
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what is the most common ion charge for a group 1 element? +1 +2 -1 -2
+1
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what is the most common ion charge for potassium? +1 +2 -1 -2
A. +1
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nitrogen is a _. metal metalloid non - metal none of these
C. non - metal
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what is the symbol for tin? sb sn ti t
B. Sn
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hydrogen is a _____. metal metalloid non - metal none of these
C. non - metal
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boron is a ______. metal metalloid non - metal none of these
B. metalloid
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what is the most common ion charge for lithium, li? +1 +2 -1 -2
A. +1
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which element will form the ion with the largest ionic radius?
Sr
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which particle represents the size of the sodium ion compared to the so…
smaller
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discuss daltons ideas by completing the following paragraph. after year…
After years of studying chemical reactions, Dalton was able to accurately determine the relative atomic weights of the elements involved in the reactions. His conclusions resulted…
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worksheet: episode 901 review name nly shula 1. the theory that explain…
1. kinetic - molecular theory of gases; ideal gas 2. temperature; pressure; attraction; repulsion; empty; straight; elastic; absolute 3. collide; a) the number of collisions with …
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explain how daltons theory of the atom and the conservation of mass are…
Dalton's atomic theory, which posits atoms are indivisible and indestructible and are only rearranged in reactions, supports the law of conservation of mass as atoms' mass is cons…
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20 sep use models list the subshells that hold the 25 electrons in a ma…
1s, 2s, 2p, 3s, 3p, 4s, 3d
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1. the molecule of water is described as a polar molecule. polar molecu…
1. Oxygen is more electronegative than hydrogen in a water molecule. It attracts the shared electrons more strongly, resulting in a partial negative charge on oxygen and partial p…
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cutting an apple in half. a physical change b chemical change pregunta …
1. a. Physical change 2. b. Chemical change 3. a. Chemical change
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19 sep use models why does the number of electrons in each principal en…
As the principal energy - shell number increases, the number of available orbitals increases (number of orbitals = $n^{2}$), allowing more electrons to be present in the shell.
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is this a chemical or a physical change? a iron nail is left in a puddl…
1. b. Chemical change 2. b. Chemical change 3. a. Physical change 4. a. Physical change
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pregunta 6 (1 punto) is this a chemical or a physical change? you combi…
Pregunta 6: b. Chemical change Pregunta 7: a. Physical change Pregunta 8: a. Physical change
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pregunta 1 (1 punto) is this a chemical or a physical change? tearing a…
Pregunta 1: a. Physical change Pregunta 2: b. Chemical change Pregunta 3: a. Chemical change Pregunta 4: a. Physical change
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the table below lists information about some diatomic molecules or mole…
| molecule | stable? | diamagnetic or paramagnetic? | bond order | | ---- | ---- | ---- | ---- | | $N_2$ | yes | diamagnetic | 3 | | $C_2^-$ | yes | paramagnetic | 1.5 | | $Be_2$ …
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identify this bunsen burner part: rotating piece that adjusts airflow ○…
Collar
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bunsen burner safety which flame is hotter and forms when the air hole …
Non - luminous blue cone flame
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give the electron configuration for oganesson (og). you must use the no…
[Rn]7s²5f¹⁴6d¹⁰7p⁶
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draw the molecular orbital (mo) electron diagram for the he₂ molecule. …
Draw a molecular - orbital diagram with an energy axis. Label two horizontal lines as σ1s (lower energy) and σ*1s (higher energy). Place two electrons (represented as arrows with …
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6. is more likely to be governed by state regulatory agencies rather th…
6. b. Setting guidelines for licensing and enforcing conduct on the job 7. b. the disposal of chemical products used in the workplace 8. d. the safe storing of chemical products u…
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give the electron configuration for gold (au). you must use the noble g…
[Xe]4f¹⁴5d¹⁰6s¹
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bunsen burner safety the safety flame is the: ○ blue flame ○ yellow - o…
Yellow - orange flame
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incorrect your answer is incorrect. • row 1: your answer is incorrect. …
|Write the symbol for this MO.|$\pi$| |--|--| |Is this a bonding or antibonding MO?|bonding| |What is the energy of this MO, compared to the energy of a 3p orbital on one of the s…
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how do you get a yellow flame? o gas tap off, collar open o air hole cl…
B. Air hole closed, gas tap fully open
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bunsen burner safety identify this bunsen burner part: long metal tube …
A. Barrel/Chimney
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give the electron configuration for uranium (u). you must use the noble…
\([Rn]7s^{2}5f^{3}6d^{1}\)
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bunsen burner safety the top of the inner cone of a blue flame is the: …
B. Hottest part
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give the electron configuration for osmium (os) you must use the noble …
[Xe]6s²4f¹⁴5d⁶
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electron configuration (level 4) give the electron configuration for te…
$[Kr]5s^{2}4d^{10}5p^{4}$
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study the following sketch of a molecular orbital (mo) in a homonuclear…
Write the symbol for this MO: $\pi$ Is this a bonding or antibonding MO? antibonding What is the energy of this MO, compared to the energy of a 3p orbital on one of the separate a…
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tag all the carbon atoms with pi bonds in this molecule. if there are n…
The carbon atom in the $C\equiv N$ bond.
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here is a graph of the pressure of nitrogen dioxide (no₂) in a reaction…
Is $NO_2$ being created or destroyed by the chemical reaction? Destroyed If $NO_2$ is being created or destroyed, what is the rate at which it is being created or destroyed 900 se…