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24 Cards in this Set
- Front
- Back
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Ernest Rutherford's model of the atom did not specifically include the -neutron -nucleus -proton -electron -electron or the proton |
neutron |
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Which two subatomic particles have approximately the same mass? -protons and neutrons -protons and electons -electrons and nuclei -neutrons and electrons -protons and alpha particles |
protons and neutrons |
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The mass number of an atom is the number of ____in the atom. -protons -neutrons -protons plus the number of electrons -protons plus the number of neutrons -electrons plus the number of neutrons |
protons plus the number of neutrons |
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the difference between the mass number of an atom and the atomic number of the atom is always equal to.. -6.02 *10^23 -the atomic number of the element the atomic mass unit the number of protons in the nucleus the number of neutrons in the nucleus |
the number of neutrons in the nucleus |
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Isotopes are atoms of the same element that... -have different numbers of electrons -have different numbers of protons -have different atomic numbers -have different numbers of neutrons -have different nuclear charges |
have different numbers of neutrons
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give the number of protons, neutrons and electrons of the 128 Te^2- anion |
52 p, 76 n, 54 e |
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Give the number of protons, neutrons, and electrons is the (41/21) SC^3+ ion |
21 p, 20 n, 18 e |
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Give the number of protons, neutrons, and electrons in the (34/16 S^-2 ion |
16 p, 18 n, 18 e |
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What is the symbol for a species composed of 35 protons, 44 neutrons, and 36 electrons |
(79/35) Br- |
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How many neutrons does the phosphorus isotope (32/15)P contain? |
17 |
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Consider the 40 Ar isotope. An atom of this isotope contains ____neutrons |
22 |
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The number of ____ can change without changing the element. -protons only -neutrons only -electrons -all of the above -neutrons and electrons only |
neutrons and electrons only |
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these three species 1H. 2H and 3H have in common... -the same number of protons -the same number of neutrons -the same mass number -the same sum of protons and neutrons |
the same number of protons |
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All of the following describe atomic weights except -Atomic weights are based on the mass of the 12C isotope -Atomic weights are expressed by an integer and will differ for different isotopes -Atomic weights are determined experimentally. -Their number values are weighted averages -Their number values are shown on the periodic table |
Atomic weights are expressed by an integer and will differ for different isotopes |
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If an element is consisted of three isotopes in the following relative abundance, what would the atomic weight of the element be? this is a hypothetical example. 30% 37 amu 50% 38 amu 20% 40 amu |
38.10 amu
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A hypothetical element consists of the following naturally occuring isotopes. What is the atomic weight of the element Isotopes Mass Abundance 1 46.041 amu 26% 2 47.038 amu 58% 3 49.034 amu 16% |
47.10 amu
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The same amount of heat is added to a 25 g sample of each of the following metals. If each of the metals was initially at 20C, which metal will reach the highest temperature? beryllium 1.82 calcium 0.653 copper 0.385 gold 0.129 nickel 0.444 |
gold 0.129 |
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name the molecular compound, SO3. sulfer oxide sulfurous acid sulfur trioxide sulfuric acid none of the above |
sulfur trioxide |
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What is the molecular formula for hydrogen chloride? HCI HCIO HCIO2 HCIO3 HCIO4 |
HCI
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Which of the following is not the name of a cation? sodium iron aluminum sulfide ammonium |
sulfide
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what is the correct formula for the carbonate ion CH3COO- C1- Co2^2- (Coo-)2 |
co3^2- |
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What is the name for MgSe? magnesium selenate selenium magneside talc magnesium selenide |
Talc |
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How do nonmetals form negative ions by losing one or more electrons by sharing electrons by gaining one or more protons by gaining one or more electrons |
by gaining one or more electrons |
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what is the formula for manganese (III) oxide? MgO MnO MnO4 Mg2O3 Mn2O3 |
Mn2O3 |
