Match each description.
Column A
1. What is the atomic number of this atom? (Hint: How many protons does it have?)
2. What is the mass number of this atom? (Hint: mass number = protons + neutrons)
3. How many valence electrons does this atom have?
4. How many energy levels does this atom have?
5. What period of the periodic table is it in? (Hint: how many energy levels does it have?)
6. What group in the periodic table is this atom in? (Hint: how many valence electrons does it have?)
Column B
a.3
b.12
c.2A
d.24
e.2
1. - e. 2
2. - d. 24
3. - a. 3
4. - c. 2A
5. - e. 2
6. - b. 12