化学
化学反応、化学量論、分子構造、元素の性質。
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22. which of the following provides evidence to support rutherfords mod…
c) Gold foil experiment # 23.
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solve for t in terms of p, v, n, and r. pv = nrt t =
$T=\frac{PV}{nR}$
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14.the positively charged particle in the nucleus of an atom is the a) …
14. d) proton 15. a) atomic number 16. c) mass number 17. e) nucleus 18. d) a neutron 19. b) an electron 20. a) 9 21. c) protons, but different numbers of neutrons
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1) na₂o bond type: ionic 2) co₂ bond type: covalent 3) o₂ bond type: co…
1. Ionic 2. Covalent 3. Covalent 4. Covalent
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6. which one of the following is not part of daltons atomic theory? a) …
6. d) Atoms change into other atoms in chemical reactions. 7. a) the same. 8. d) All matter is composed of protons, electrons, and neutrons. 9. b) atom. 10. c) Atoms are made up o…
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which of these is the chemical formula for glucose? co2 h2o cho c6h12o6
\(C_6H_{12}O_6\)
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name: kara c date: unit 3 review - atoms 1. which one of the following …
1. d) The mass of a system is dependent upon chemical reactions that may occur. 2. d) the Law of Conservation of Mass. 3. c) the Law of Multiple Proportions. 4. c) Definite Propor…
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the photograph shows the most abundant substance on earths surface. whi…
C. It can be separated into two substances by a chemical process.
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the diagram shows a model of an atom. who first proposed this model? a.…
B. Bohr
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match each scientist to their discovery regarding the atom. rutherford …
Rutherford - Atoms have a positive nucleus. Millikan - Electrons have a charge of -1. Thomson - Atoms contain electrons. Dalton - Atoms are indivisible.
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che105(mwf) - worksheet #21 - photoelectric effect 1) when a compound c…
The wavelength of the emitted photons is \(462\space nm\), which corresponds to the blue color.
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what is the best reason for the difference in properties of licl and c6…
One compound is covalent, and the other is ionic.
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some atoms are exceptions to the octet rule by having an expanded octet…
The atom has empty d - orbitals.
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who used scientific investigations to study atoms? check all that apply…
Dalton, Rutherford, Thomson.
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which compound contains only a nonpolar covalent molecule? o o₂ o hci o…
\(O_2\)
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who was the first person to suggest the existence of atoms? dalton demo…
Democritus
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when silver tarnishes, it reacts with hydrogen sulfide (h₂s) or oxygen …
Tarnishing is a chemical property because it involves a chemical reaction where silver reacts with other substances (like hydrogen sulfide or oxygen) to form new substances (silve…
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monday 10/20 physics teacher wants to help her students understand the …
A. A molecule built with different sizes and colors to show the types and arrangement of atoms.
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west virginia has a lot of mountains. which industry could be a direct …
Coal Industry
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what is an atom? atoms are the basic units of matter and the defining s…
1. Atoms are the basic units of matter and the defining structure of elements. 2. Atoms are made up of three particles: protons, neutrons and electrons. 3. Electrons exist in a cl…
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which option best describes electromagnetic waves that have enough ener…
D. Ionizing radiation
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which of these discoveries contradict components of daltons atomic theo…
Atoms contain smaller particles: protons, neutrons, and electrons. Atoms of a given element can have different numbers of neutrons. Nuclear reactions can change an atom of one ele…
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how can damage to living things occur from exposure to x - rays or gamm…
A. Atoms and molecules in the body can be ionized.
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the problems below will be worth 2 mastery points each. 1 point each fo…
3. \(0.0618\text{ mol}\) 4. \(2.26\times 10^{24}\text{ atoms}\)
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mole-to-mass conversion if you want to calculate for the mass of anothe…
\(146.1\space g\)
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mole - to - mass conversion if you want to calculate for the mass of an…
The mass of \(NaCl\) produced is \(146.1\space g\)
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does the following text have an inappropriate shift in verb tense? if s…
In her chemistry demonstration, Kayla showed that at sea level, water without impurities boils at \(100^{\circ}C\).
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4. what happens to nuclei during fusion? they remain the same and relea…
They combine to form heavier nuclei.
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3. what happens to nuclei during fission? they decay. they are combined…
They split into smaller nuclei.
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1. what is the charge of a beta particle?+1-1-2+2
-1
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5. which of these describes two isotopes of hydrogen? select all that a…
- They have similar chemical properties. - They have different numbers of neutrons.
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3. how many protons, neutrons, and electrons are in a neutral isotope o…
4 protons, 4 electrons, 5 neutrons
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2. a neutral isotope of sodium has an atomic number of 11 and a mass nu…
D. 11
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1. how are isotopes of the same element alike? select all that apply. t…
- They have the same number of protons. - They have the same atomic number.
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question 5 1 pt a reaction that absorbs energy from its surroundings is…
- Question 5: B. endergonic - Question 6: A. reactants, products
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figure l 1. bd3 2. h2o2, oh- l-1 l-3 l-2 l-4
L - 2
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6. convert 3.5 kcal to joules, then to kilojoules. 7. how many milligra…
\(14644\ J\) and \(14.644\ kJ\)
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unit analysis practice - can you do a real chemistry problem? conversio…
\(1.2\times 10^{24}\) molecules ### Question 2
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directions: use your periodic table to complete the worksheet. 1. what …
1. Ag 2. 200.59 3. Nickel 4. Chlorine 5. Fe, Cu (answers may vary) 6. 11 7. He, Ne (answers may vary) 8. F, Cl (answers may vary) 9. W 10. 63.55 11. Krypton 12. Atomic number 13. …
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which of the following atom(s) below has/have five valence electrons? a…
B. N
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what type of bonding is present in c₁₂h₂₂o₁₁? answer: a covalent bonds …
A. covalent bonds only
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write the complete ground - state electron configuration of li^+.for mu…
\(1s^{2}\)
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write the complete ground - state electron configuration of li. for mul…
\(1s^{2}2s^{2}\)
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the ground state electron configuration of a se atom is incorrect, 3 at…
C. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{4}\)
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the ground state electron configuration of a se atom is answer: a $1s^{…
E. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{1}4p^{1}\) (assuming a \(4p^{0}\) implicit and a typo in the option's \(4p\) count, as the key is the \(3d^{1}\) which is correct for …
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which element has the electron configuration (1s^{2}2s^{2}2p^{6}3s^{2}3…
D. Mn
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rank the following atoms in order of decreasing size (i.e., largest to …
A. \(Rb > Mg > B > N > F\)
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write the complete ground - state electron configuration of be²⁺. for m…
\( 1s^{2} \)
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classify the following compounds as ionic or covalent (molecular): of₂,…
A. covalent, ionic, covalent
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question 57 of 65 write the condensed (noble - gas) electron configurat…
\([Xe]6s^{2}4f^{14}5d^{10}\)
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write the complete ground - state electron configuration of cl^-. for m…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}\)
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write the complete ground - state electron configuration of cl. for mul…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{5}\)
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the ground state electron configuration of an al atom is answer: a $1s^…
B. \(1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}\)
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10. a 15.00 - g sample of an unknown hydrocarbon is analyzed by combust…
\(CH\)
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write the complete ground - state electron configuration of ap. for mul…
\(1s^{2}2s^{2}2p^{6}\)
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6. what do the following words all have in common: silicon, cobalt, bor…
They are all elements in the periodic table.
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write the condensed (noble - gas) electron configuration of cl. for mul…
\([Ne]3s^{2}3p^{5}\)
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rank the following atoms in order of increasing size (i.e., smallest to…
D. \(O < Be < Li < Mg < Ba\)
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what is the formula for an ionic compound containing sc^{3+} and o^{2-}…
B. \(Sc_2O_3\)
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what element is designated by the orbital diagram below? a n atom would…
C. \(F\)
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what element is designated by the orbital diagram below? answer: a n b …
A. N
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which of the following is a transition metal? answer: a: strontium b: s…
B. silver
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write the condensed (noble - gas) electron configuration of o. for mult…
\[ [\text{He}]2s^{2}2p^{4} \]
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what is a value of l for the orbital shown below?
\(2\)
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in a ground state atom of al how many electrons total will have the qua…
6
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atoms from which of the following pairs are most likely to form an ioni…
B. titanium and oxygen
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what is the maximum number of electrons that can have the following set…
\(2\)
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which of the following sets of quantum numbers represents an electron w…
E. \(n = 4\), \(l = 1\), \(m_{l}=1\)
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write the complete ground - state electron configuration of p. for mult…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{3}\)
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which of the following groups of elements tend to form cations? answer:…
A. metals
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which of the orbital electron configurations is not possible? answer: a…
C. \(4p^{7}\)
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write the complete ground - state electron configuration of mg²⁺. for m…
\(1s^{2}2s^{2}2p^{6}\)
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multiple choice question james remembered his last psychology quiz ques…
schemas.
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given a particular value of the principal quantum number (n), which qua…
b. \(\ell\)
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write the complete ground - state electron configuration of bromine. fo…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{5}\)
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how many orbitals are allowed in the subshell when $l = 2$?
5
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write the complete ground - state electron configuration of cs^+ for mu…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{10}5p^{6}\)
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the trend towards smaller atomic radii as one moves to the right in a p…
E. due to the effective nuclear charge increasing.
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try again your answer is incorrect. • row 1: hcn: the problem atom(s) a…
No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are: \(C\), \(N\)
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try again your answer is incorrect. • row 1 : hcn: the problem atom(s) …
No, it has the right number of valence electrons but doesn't satisfy the octet rule. The symbols of the problem atoms are: \(C, N\)
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write the complete ground - state electron configuration of k. for mult…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{1}\)
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which periodic trend quantifies the amount of energy required to remove…
B. Ionization energy
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which of the following sets of quantum numbers could describe an electr…
D. \(n = 3\), \(\ell=0\), \(m_{\ell}=0\)
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write the condensed (noble - gas) electron configuration of aluminum. f…
\([Ne]3s^{2}3p^{1}\)
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of the following, which sublevel is filled last? answer: a 3d b 4s c 4p…
D. \(4d\)
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which of the following elements has the smallest first ionization energ…
E. Cs
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rank the following molecules in order of increasing dipole moments: bcl…
\(BCl_3 < BCl_2H < BClH_2\)
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which of the following elements has the smallest first ionization energ…
D. \(Sn\)
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which of the following radii comparisons is correct? a. ( n^{3 - } < n …
B. \(Ti^{2+}>Ti^{3 +}\), C. \(In^{3+}<In^{+}\)
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1st attempt part 1 (1 point) the overall (net) dipole of this compound …
Part 1: A. Part 2: B.
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which of the following radii comparisons is correct? answer: a $n^{3 - …
A. \(N^{3+}<N\), C. \(In^{3+}<In^{+}\)
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write the condensed (noble - gas) electron configuration of barium. for…
\([Xe]6s^{2}\)
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which of the following metals would be predicted to have the smallest a…
E. tantalum (Ta)
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write the complete ground - state electron configuration of al. for mul…
\(1s^{2}2s^{2}2p^{6}3s^{2}3p^{1}\)
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part 1 (1 point) choose one: a polar b. nonpolar
B. nonpolar
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which element is classified as a noble gas? answer: a helium (he) b nit…
A. helium (\(He\))
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classify the following compound as covalent (molecular) or ionic: $n_{2…
A. molecular
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in one atom, what is the maximum number of electrons that could have th…
\(8\)
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a student draws the orbital diagram below for the 3d electrons in a v a…
D. It violates Hund's rule.
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list the following atoms in order of increasing size (atomic radius): o…
D. \(O < Cl < Se\)