1.     How many protons does an atom have if it has an atomic number of 12?
a.     12                         b. 6                           c. 3                           d. 10
 
2.     Hydrogen is the simplest and the lightest element. It has an atomic number of 1. How many protons does Hydrogen atom have?
a.     1                           b. 2                           c. 3                           d. 4
 
3.     Helium is an inert gas that is found in large amounts in the core of the stars as a product of thermonuclear fusion. It has an atomic mass of 4 and atomic number of 2. How many neutrons does a Helium atom have?
a.     1                           b. 2                           c. 3                           d. 4
 
4.     Isotopes are atoms of the same element with the same number of protons and  ___________.
a.     A different number of electrons.
b.     A different number of molecules.
c.     A different number of neutrons.
d.     The same number of neutrons.
 
5.     In a neutral atom, the number of protons _____________ the number of electrons.
a.     Equals                  b. is less than                 c. is greater than
 
6.     An atoms becomes negatively charged by _______.
a.     Gaining an electron
b.     Losing an electron
c.     Losing a proton
d.     Gaining a neutron
 
7.     A(n) ______________ is a positively charged particle in the nucleus of an atom.
a.     Proton                   b. electron                c. neutron                 d. positron
 
8.     An atom or group of atoms that has a net negative charge is called a(n) _________.
a.     Ion                        b. cation                    c. anion                          d. compound
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