Atomic Structure Question Preview (ID: 24227)


Review Of Atomic Structure! TEACHERS: click here for quick copy question ID numbers.

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.

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.

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.

Changing the number of neutrons in an atom causes it to be a(n):
a) isotope
b) element
c) ion
d) charge

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

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

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

A single proton has what electrical charge?
a) no charge
b) positive charge
c) negative charge
d) either a positive or negative charge

The nucleus of an atom consists of
a) electrons
b) neutrons
c) protons and neutrons
d) protons and electrons

An element is determined by the number of
a) atoms
b) protons
c) electrons
d) neutrons

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

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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