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ACS Chemistry Final Exam Questions and answers | Updated 2024/25 RATED A+
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ACS Chemistry Final Exam Questions and answers | Updated 2024/25 RATED A+
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ACS Chemistry Final Exam Questionsand answers | Updated 2024/25 RATED
A+
Layout of an element (mass # & atomic #) - ii ii ii ii ii ii ii ii ii ii ii ii
ii atomic number = - # of protons ii ii ii ii ii ii ii ii
ii mass number = - # of protons + neutrons
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ii the number of protons in a neutral atom will equal the - # of electrons
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ii how to find the correct number of neutrons - mass number - atomic number
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ii Forms of the same elements that differ in amount of neutrons - isotopes
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ii What particle, if lost from the nucleus, would NOT cause a change in the atomic number? -
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ii iia neutron because it has no charge
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When alpha particles were shot at a metal foil target, most passed through without
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deflections, while others deflected at large angles. What did this suggest to Rutherford? -
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that the atoms of the metal were mostly empty space, while the nucleus consisted of most
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of the mass which included highly condensed positive particles (which caused the
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deflection).
ii
An atom has a valence shell configuration of 1s1. To which group of elements on the
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periodic table does it belong? - IA
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alkali metals ii
ii electromagnetic spectrum - ii ii ii ii ii
ii The greater the wavelength of a photon..? - the lower its frequency
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ii The greater the frequency of a photon...? - the shorter its wavelength
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ii Light energy formula - ii ii ii ii ii ii
ii What does C in the light energy formula represent? -
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ii Give the ground-state electron configuration of an atom in the second period - 1s2 2s1
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Electrons configuration rule that states electrons do not pair until they have to. (put one
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electrons in each electron domain then pair up) - Hund's rule
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, An experimental phenomena associated with atoms having unpaired electrons - which
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states such substances are attracted to magnetic fields - Paramagnetism
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ii Which drop in energy level results in the greatest emission of energy? - n=2 to n=1
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ii quantum numbers - ii ii ii ii ii
What do the 4 quantum numbers stand for? - n = energy level
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l = (n-1)
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ml -l to l ii ii ii
mn 1/2 or -1/2 (spin) ii ii ii ii
List the quantum numbers for the s, p, d, and f orbitals - s 1,0,0
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p 2, 1, -1-0-1
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d 3, 2, -2--1-0-1-2
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f 4, 3 -3--2--1-0-1-2-3
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ii Py orbital - ii ii ii ii ii
ii Which element is represented by X - Chromium ii ii ii ii ii ii ii ii ii
What two subatomic particles have the most mass, but occupy very little of the volume of
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an atom - protons and neutrons
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ii Define Isoelectronic - Having the same amount of electrons
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ii How does a sodium ion differ from a sodium atom? - the sodium ion has fewer electrons
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two or more compounds with the same formula but a different arrangement of atoms in the
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molecule and different properties - isomer
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two or more different physical forms in which an element can exist. Graphite, charcoal, and
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diamond are all ________ of carbon. - allotropes
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ii What makes up an alpha particle? - 2 protons and 2 neutrons
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What did Millikan discover from his oil drop experiments? - the magnitude of the charge
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on an electron
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ii Periods vs Groups - ii ii ii ii ii ii
ii when an atom of an electropositive atom becomes an ion it..? - becomes larger
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