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![Page 1: X Chapter 4 Test Review](https://reader036.fdocuments.us/reader036/viewer/2022062517/5681365c550346895d9de91b/html5/thumbnails/1.jpg)
X Chapter 4 Test Review
The Atomic Theory
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The smallest particle that still retains the property of an element is called what?
A. neutronB. atomC. electronD. molecule
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In the Schrödinger model, what is the name for where an electron is found 90% of the time?
A.Energy levelB.IsotopeC.Ground stateD.Orbital
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The higher energy level for an electron is called what in the Bohr model?
A. ground stateB. orbitalC. excited stateD. energy level
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What must be equal in a neutral atom?
A. Neutrons and protonsB. Electrons and neutronsC. Protons and electrons
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Atoms with a charge are called what?
A. IonsB. CationsC. AnionsD. Isotopes
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In the isotope notation shown below, what does the Z and A stand for?
A. Z = atomic symbol, A = atomic #
B. Z = mass #, A = atomic #C. Z = mass #, A = atomic symbolD. Z = atomic #, A = mass #
Z A X
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Who discovered the electron?
A. JJ ThomsonB. Robert MillikanC. Ernest RutherfordD. James Chadwick
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Who discovered the nucleus?
A. JJ ThomsonB. Robert MillikanC. Ernest RutherfordD. James Chadwick
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What is the mass number if an atom has 14 neutrons, 15 protons, and 16 electrons?
A. 45B. 31C. 30D. 29
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How many protons, neutrons, and electrons are in the following sample?
A. p+ = 35, n = 45, e- = 80B. p+ = 35, n = 80, e- = 35C. p+ = 45, n = 35, e- = 45D. p+ = 35, n = 45, e- = 35
8035
Br
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How many protons, neutrons, and electrons are in the following sample?
A. p+ = 27, n = 32, e- = 27B. p+ = 32, n = 27, e- = 32C. p+ = 27, n = 32, e- = 25D. p+ = 27, n = 59, e- = 25
5927
Co2+
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What is the isotope notation for phosphorous-31?
A. 3115P
B. 1531P
C. 4615P
D. 3015P
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What is Rutherford’s famous experiment in which he discovered the nucleus?
A. Oil drop experimentB. Cathode ray tube
experimentsC. Gold-foil experimentD. Plum pudding experiment
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Who is credited with the plum pudding model of the atom?
A. JJ ThomsonB. Robert MillikanC. Ernest RutherfordD. James Chadwick
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Who discovered the neutron?
A. JJ ThomsonB. Robert MillikanC. Ernest RutherfordD. James Chadwick
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What is the atomic number equal to?
A. The # of electrons in the atom
B. Sum of protons & neutrons in the atom
C. The mass numberD. The # of protons in the
nucleus
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What is the mass number equal to?
A. The # of protons in the nucleus
B. The sum of the protons & neutrons in the nucleus
C. The # of electrons in the atom
D. The charge on an ion
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Which of the following are found in the nucleus of an atom?
A. protonsB. neutronsC. electronsD. More than one of the aboveE. None of the above
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Which of the following pairs below are isotopes?
A. Carbon-12 and Carbon-13B. Uranium-238 and
Neptunium-238C. Chlorine-35 and Fluorine-19
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What is the atomic mass on the periodic table equal to?
A. The weighted average of the masses of all naturally occurring isotopes
B. The sum of the protons & neutrons in the nucleus
C. The number of protons in the nucleus
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Schrodinger is credited with which model of the atom?
A. The plum pudding modelB. The billiard ball modelC. The quantum mechanical
modelD. The Bohr model
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How many protons are in the nucleus of a nitrogen atom?
A. 14 protonsB. 21 protonsC. 7 protonsD. 8 protons
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How many neutrons are in the nucleus of a Iodine-127 atom?
A. 53 neutronsB. 127 neutronsC. 180 neutronsD. 74 neutrons
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What does the 34 represent in sulfur-34?
A. Atomic numberB. Mass numberC. Atomic massD. Electrons in the atom
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If an iron ion has a charge of +2, how many electrons does the ion have?
A. 24 electronsB. 26 electronsC. 28 electrons