1. A particle that moves around the nucleus is a(n)...

2. The center of an atom that holds protons and neutrons?

3. A particle in the nucleus of a atom with no electrical charge

4. How many neutrons does Na have?

5. The number of protons is equal to

6. How many protons does Calcium have?

7. How many protons does this element have?

8. The yellow atoms are called

9. Rows on the period table are called _____ while columns are called _____.

10. What does the H stand for?