Chemie
Chemische Reaktionen, Stöchiometrie, Molekülstrukturen und Elementeigenschaften.
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7. which of these is a metal? a) oxygen b) iron c) neon d) chlorine 8. …
7. B. Iron 8. C. Nitrogen 9. A. Oxygen 10. B. Sodium 11. B. Gold 12. B. The number of protons 13. C. Electrons 14. B. Proton 15. A. Protons + Neutrons
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14 identify which of these points explain why the group 1 metals are hi…
- **Question 14**: I and III - **Question 15**: Metalloids
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12 an element with the electron configuration 1s2 2s2 2p1 would be in t…
B. False ## 13
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identify which of the following elements has the highest metallic chara…
- First question: Sb - Second question: II and III only
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1. the periodic table is organized by increasing: a) atomic number b) a…
1. A. Atomic number 2. C. Period 3. B. Group 4. B. Atomic number 5. B. Dmitri Mendeleev 6. C. Atomic number
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which of the following would you put in box a? * (0.5 points) s block d…
6
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which of the following would you put in box b? * (0.5 points) 1 $1s^{2}…
5. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{7}\)
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3. what is an example of a homogeneous mixture? gold soil carbon dioxid…
salt water
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7 what is the period number for mercury? * (0.5 points) 3 6 13 1 12
6
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use the periodic table to rank the orange elements from smallest to lar…
Ca < Sr < Rb
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5 identify the correct trend going down groups 1 and 17. * (0.5 points)…
electronegativity decreases
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11. describe the cause of the attractions between molecules of water.
The attractions between water molecules are due to hydrogen bonding. Hydrogen bonding occurs because water molecules are polar. The oxygen (more electronegative) has a partial neg…
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which of the following would you put in box c? * (0.5 points) 1 $1s^{2}…
1. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{5}\)
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3 the energy change that occurs when one electron is added to a species…
Electron affinity
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2 use the periodic table to rank the blue elements from smallest to lar…
Br < Se < I
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hi, maya. when you submit this form, the owner will see your name and e…
2
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9. remember that electrons in a water molecule are more dense around th…
a. The oxygen atom has a partial negative charge compared to the hydrogen atoms. b. The hydrogen atoms have a partial positive charge compared to the oxygen atom.
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which rhyme scheme is used in this excerpt from \ballad of birmingham\ …
A. ABCB
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which of the following molecules is not an electrolyte? a na+ b k+ c cl…
D. \(H_{2}O\)
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which describes any substance that shatters or breaks easily? malleable…
Brittle
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what property do all of the group 18 elements have that makes them stan…
They are very unlikely to bond with any element, whether it is metallic or not.
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which statement best explains why radon and krypton do not bond easily …
They have eight electrons in their valence shells, so they are stable without gaining or losing electrons.
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which element has a complete valence electron shell? selenium (se) oxyg…
argon (Ar)
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when looking across the periodic table from left to right, which of the…
group 14
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on the periodic table, the elements known as noble gases are all found …
group 18.
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which describes any compound that has at least one element from group 1…
halide
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where are the most reactive nonmetal elements found on the periodic tab…
at the top of group 17
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looking at the same nonmetal group on the periodic table, how does the …
The period 2 element would be more reactive because the attractive force of protons is stronger when electrons are attracted to a closer electron shell.
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krypton is named after the greek word that means \secret.\ which explai…
Krypton is a noble gas, so it was difficult for chemists to find it, as though it was a secret.
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use with textbook pages 202 - 211. chemical equations match the term on…
1. A chemical that forms in a chemical reaction: A. a chemical that forms in a chemical reaction 2. A chemical that reacts in a chemical reaction: B. a chemical that reacts in a c…
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use with textbook pages 202 - 211. chemical equations match the term on…
D. I, II, and III
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use with textbook pages 202 - 211. chemical equations match the term on…
9. D. 16 10. D. I, II, and III 11. A. 1, 4, 5, 1 12. C. \(Na_{2}S\) and \(Cu(NO_{3})_{2}\) 13. B. hydrogen
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name lucas hetzworc date extension section 4.3 use with textbook pages …
1. Word equation: Iron + Oxygen → Iron(II) oxide; Balanced equation: \(2Fe + O_{2}\to 2FeO\) 2. Word equation: Hydrogen chloride + Sodium carbonate → Carbon dioxide + Sodium chlor…
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which statement correctly compares the valence electrons for atoms of f…
Francium has fewer valence electrons, but they are in a higher energy level.
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the periodic table unit test which statement best explains why hydrogen…
Hydrogen does not have any neutrons.
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which element has four valence electrons? (1 point) silicon (si) sulfur…
silicon (Si)
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based on properties of elements in the periodic table, which element is…
vanadium (V)
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the periodic table unit test which statement about metals and nonmetals…
Metals can be hammered into thin sheets, and nonmetals are brittle.
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how many atoms of oxygen in the chemical formula 2ca(clo2)2?
8
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chalk is an ionic compound. which is a property of all ionic compounds …
hardness and brittleness
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the 2022 nobel prize in chemistry was awarded to three pioneers in the …
A. Stanford;
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while researching a topic, a student has taken the following notes: • p…
C. While still highly effective, the new platinum catalyst requires far less platinum (only 0.0001% of the atoms in the mixture) than typical platinum catalysts, making it more pr…
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while researching a topic, a student has taken the following notes: • v…
B. Since synthetic vanillin is around ten times cheaper to produce than natural vanillin, around 99% of vanillin used in food products is synthetic.
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this chart shows characteristics of three different types of atoms. whi…
Atom X will accept electrons from Atom Y.
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ionic compounds form crystal structures. molecular structures. pure ele…
crystal structures.
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question 3 (1 point) the estimated annual costs attributable to alcohol…
d) more than 1% of the gross national product. # Question 4
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use with textbook pages 202 - 211. word equations write the skeleton eq…
1. Skeleton: \(H_2+O_2 ightarrow H_2O\); Balanced: \(2H_2+O_2 = 2H_2O\) 2. Skeleton: \(Fe_2O_3+H_2 ightarrow H_2O+Fe\); Balanced: \(Fe_2O_3 + 3H_2=3H_2O + 2Fe\) 3. Skeleton: \(Na+…
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to what extent do covalent compounds conduct electricity? always usuall…
never
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use with textbook pages 202 - 211. section 4.3 word equations write the…
1. Skeleton: \(H_2+O_2 ightarrow H_2O\); Balanced: \(2H_2+O_2 = 2H_2O\) 2. Skeleton: \(Fe_2O_3 + H_2 ightarrow H_2O+Fe\); Balanced: \(Fe_2O_3 + 3H_2=3H_2O + 2Fe\) 3. Skeleton: \(N…
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what does the octet rule state that explains why atoms bond? an atom bo…
An atom bonds to have eight valence electrons to become stable.
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what is the missing particle? $\\begin{array}{r} 147 \\\\ 62 \\end{arra…
\(^{143}_{60}\text{Nd}\)
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use with textbook pages 206 - 211. balancing equations starting with th…
1. \(H_2+F_2 = 2HF\) 2. \(2Sn + O_2=2SnO\) 3. \(MgCl_2 ightarrow Mg + Cl_2\) 4. \(2KNO_3 = 2KNO_2+O_2\) 5. \(2BN + 3F_2=2BF_3+N_2\) 6. \(CuI_2+Fe ightarrow FeI_2+Cu\) 7. \(2Li+2H_…
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what is the missing particle? 144/60 nd→4/2 he+? 140/58 nd 140/58 ce 14…
\(_{58}^{140}\text{Ce}\)
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which explanation of how to use basic shapes is most correct if someone…
You can divide the umbrella's structure into triangular polygons and then use basic square shapes to block out the shapes of the chairs before adding details.
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what is the missing particle? 198 86 rn → 4 2 he + ? 194 84 po 194 84 r…
\(^{194}_{84}\text{Po}\)
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what is the missing particle? 233/92 u → 4/2 he + ? 233/90 th 229/90 th…
\(^{229}_{90}Th\) (the second option \(^{229}_{90}Th\))
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which statement describes a characteristic of persian carpets? weavers …
Weavers used geometric and floral patterns to create symmetrical designs.
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question 25 4 pts the correct formula for a compound formed from the el…
\(Al_{2}S_{3}\) (the first option)
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which sentence describes inca textiles? weavers made them using cotton …
Colors and patterns on them identified where people lived.
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what is the chemical formula for cobalt(ii) bromide? co₂br cobr₂ co₂br₃…
B. \(CoBr_{2}\)
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question 23 4 pts what is the chemical formula for the binary compound …
\(Co_{2}O_{3}\)
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question 22 4 pts the compound ( mathrm{ca}left(mathrm{no}_{3} ight)_{2…
calcium nitrate
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question 21 what is the systematic name for p2o5? phosphorus pentoxide …
diphosphorus pentoxide
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what is the systematic name for clo₃⁻ perchlorate chlorite chlorine tri…
chlorate
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question 19 4 pts the shape of the phosphorus trifluoride molecule (pf₃…
trigonal pyramidal
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question 18 4 pts the main type of attractive forces between molecules …
hydrogen bonds
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what is the formula of the predicted product from heating potassium met…
\(K_{3}P\)
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question 16 the number of dots in the electron dot symbol of fluorine i…
7
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5 multiple answer 20 points select all the elements below that are clas…
Mg, Al, Fe
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question 15 the number of electron energy levels in an aluminium atom i…
3
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what is the missing particle? 190/78 pt → 4/2 he + ? 186/76 pt 186/76 o…
\(\ce{^{186}_{76}Os}\)
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4 multiple choice 20 points identify the atom below. magnesium carbon c…
calcium
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a fictional element named nivad ium is found to have three naturally oc…
\(22.8\) amu
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which of the following has the largest atomic radius? na p al si mg
Na
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3 multiple choice 20 points analyze the chemical formula to correcting …
Silver = 2, Carbon = 1, Oxygen = 3 (the third option)
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question 12 which of the following elements has the most metallic chara…
K
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question 11 atoms of the same element can have different atomic masses …
the number of neutrons can vary
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question 10 how many protons and neutrons are in cl - 37? 37 protons, 1…
17 protons, 20 neutrons
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analyze the chemical formula to correcting identify the number of atoms…
Second option: Lithium = 2, Carbon = 1, Oxygen = 3
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which is not a characteristic of metals, shiny ductile malleable poor c…
poor conductors of heat
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question 8 which of the following is not a correct name, symbol combina…
Iron, I
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1 multiple choice 20 points analyze the chemical formula to correcting …
C. Calcium = 1, Chlorine = 2
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the elements in groups ia, iia, and viia are called ____________, respe…
alkali metals, alkaline earth metals, halogens
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question 6 silicon is a, transition element synthetic element metalloid…
metalloid
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question 5 which of the following elements is a metal? sulfur nitrogen …
Manganese
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answer on the next slide based on the introductory videos and your know…
Ca. Because in the periodic table, for group 2 metals (where Ca and Mg belong), reactivity with water increases down the group. Ca is below Mg in group 2. Also, compared to Al, Fe…
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which statement about electrons is false?electrons have a charge of 1-m…
Most atoms have more electrons than protons.
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question 3 what is the approximate diameter of an atom? 10^{-10} cm 10^…
\(10^{-10}\text{ m}\)
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question 2 what term refers to a vertical column in the periodic table …
group
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question 1 au is the symbol for............... gold sodium aluminium ar…
gold
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select all the answers that describe an isotope of an atom. oxygen 16 o…
- have a different atomic mass. - have a different number of neutrons.
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4 multiple choice 20 points which is not true about all of these elemen…
They all have the same number of protons.
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3 multiple answer 20 points based on the location of sodium on the peri…
B. Li, E. K
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protons: 9 neutrons: 10 electrons: 10 ion neutral
Ion
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2 multiple choice 20 points which group of elements have similar chemic…
Question 2: Be, Mg, and Ca. Question 3: (If full options of group 1 elements like Li, K are present) Li, K (but based on the partial info given, if only Be is considered from the …
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iron is a good conductor of heat and electricity and is malleable. what…
metal
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what is the name of the element? 1 1 h bohrium hydrogen helium
hydrogen
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3 multiple choice 20 points least likely to conduct heat and electricit…
3. nonmetal 4. F, Br, H
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what particle has 12 protons and 13 neutrons? 12 mg 24.31 23 v 50.94 11…
\(Mg-25\)
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what is the name of the element? 63 29 cu europium cobalt copper
copper