Atomic Structure Question Preview (ID: 24227)
Review Of Atomic Structure!
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The 3 basic components of an atom are:
a) protons, neutrons, and ions
b) protons, neutrons, and electrons
c) protons, neutrinos, and ions
d) quarks, neutrons, and electrons
An element is determined by the number of
a) atoms
b) protons
c) electrons
d) neutrons
The nucleus of an atom consists of
a) electrons
b) neutrons
c) protons and neutrons
d) protons and electrons
A single proton has what electrical charge?
a) no charge
b) positive charge
c) negative charge
d) either a positive or negative charge
Which particles have approximately the same size and mass as each other?
a) neutrons and electrons
b) electrons and protons
c) protons and neutrons
d) none - they are all very different in size and mass
Which two particles would be attracted to each other?
a) protons and electrons
b) electrons and neutrons
c) protons and neutrons
d) all particles are attracted to each other
The atomic number of an atom is ALWAYS equal to:
a) the number of electrons
b) the number of neutrons
c) the number of protons
d) the number of protons plus neutrons
Changing the number of neutrons in an atom causes it to be a(n):
a) isotope
b) element
c) ion
d) charge
When you change the number of electrons in an atom, you produce a different:
a) isotope
b) ion
c) element
d) atomic mass
According to atomic theory, electrons are usually found:
a) in the atomic nucleus
b) outside the nucleus, in orbit around it
c) outside the nucleus in energy levels, also known as the electron cloud
d) Two answers above are correct.
An ion with a -1 charge
a) has gained an electron.
b) has lost an electron.
c) has lost a proton.
d) has gained a neutron.
Mass number
a) is the number of protons plus neutrons.
b) is the number of protons plus electrons.
c) is the number of electrons plus neutrons.
d) is the number of protons only.
Which of the following is true of oxygen with 8 protons, 8 neutrons, and 8 electrons?
a) It has a mass number of 8.
b) It has an atomic number of 8.
c) It has atomic number of 16.
d) It has a charge of +8.
Positive ions are called _____________ and they are formed by _____________ electrons.
a) cations, gaining
b) cations, losing
c) anions, gaining
d) anions, losing
Anions are _____________ ions and they are formed when an atom __________ electrons.
a) negative, gains
b) positive, gains
c) negative, loses
d) positive, loses
The atomic number of Lithium is__________.
a) 6.9
b) 7
c) 3
d) None of these
The number of neutrons in an atom is
a) the same as the atomic number.
b) the same as the mass number.
c) equal to the number of protons and electrons.
d) equal to the mass number minus the number of protons.
An isotope of Nitrogen-20 has __________ protons and ___________ neutrons.
a) 7, 7
b) 13, 7
c) 7, 13
d) 7, 20
How many electrons are in a H+ ion?
a) 0
b) 1
c) 2
d) None of these.
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