Subatomic Particles, Isotopes And Ions Question Preview (ID: 60554)
Review Of The Subatomic Particles, Isotopes, And Ions.
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The total number of protons and neutrons in the nucleus of an atom is its
a) atomic number.
b) mass number.
c) Avogadro number.
d) average atomic mas
Which subatomic particle balances the charge in the nucleus?
a) atoms
b) electrons
c) neutrons
d) protons
Isotopes are atoms of the same element that have different
a) a. principal chemical properties.
b) b. masses.
c) c. numbers of protons.
d) d. numbers of electrons.
All atoms of the same element have the same
a) atomic mass.
b) mass number.
c) number of neutrons.
d) atomic number.
Chlorine has atomic number 17 and mass number 35. It has
a) 17 protons, 17 electrons, and 18 neutrons.
b) 35 protons, 35 electrons, and 17 neutrons.
c) 17 protons, 17 electrons, and 52 neutrons.
d) 18 protons, 18 electrons, and 17 neutrons.
The atomic number of oxygen, 8, indicates that there are eight
a) a. protons in the nucleus of an oxygen atom.
b) b. oxygen nuclides.
c) c. neutrons outside the oxygen atom's nucleus.
d) d. energy levels in the oxygen atom's nucleus.
Phosphorus-33 (atomic number 15) contains
a) a. 33 protons.
b) b. 18 neutrons.
c) c. 33 neutrons.
d) d. 18 protons.
An element has an atomic number of 76. The number of protons and electrons in a neutral atom of the element are ____.
a) 152 protons and 76 electrons
b) 76 protons and 0 electrons
c) 38 protons and 38 electrons
d) 76 protons and 76 electrons
What does the number 84 in the name krypton-84 represent?
a) the atomic number
b) the mass number
c) the sum of the protons and electrons
d) twice the number of protons
What contributes to the mass of the atom?
a) electrons
b) protons
c) protons and neutrons
d) protons and electrons
A positive ion forms when a neutral atom
a) gains electrons
b) loses electrons
c) does not lose or gain electrons
d) remains neutral
The O^-2 means that a neutral atom of oxygen
a) lost 2 electrons
b) gained 2 electrons
c) squared 2 electrons
d) subtracted 2 electrons
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