Answer
Matching the subatomic particles (1 to 3) to each of the descriptions below:
1. protons 2. neutrons 3. electrons
Work Step by Step
a. refer to the concept map on page 142.
b. atomic number= number of protons
c. protons are positively charged.
d. electrons are negatively charged.
e. Mass number - atomic number (number of protons)= number of neutrons.
