2 points each
Match the vocabulary word with the correct definition.
1. Proton
a. Particles with no charge
found in the nucleus of
most atoms.
5. Atom
e. Total number of protons
and neutrons in the
nucleus of an atom.
2. Neutron
b. Center of atom. Contains
most of the atom’s mass.
6. Atomic
Number
f. The number of protons in
an atom. Also the way the
elements are numbered.
3. Electron
c. Positively charged particle
in the nucleus of the atom.
Determines the element.
7. Atomic
Mass
g. The smallest part of an
element. The building
block of all things.
4. Nucleus
d. Negative particles that are
found in the space around
the nucleus.
8. Electron
Cloud
h. The space outside the
nucleus where negatively
charged particles are
found.
5 points
9. Label the information below.
6 points