1. What is the mass number and name of an element with 8 protons and 8 neutrons?

2. An element with a mass number of 10 and an atomic number of 6 has how many protons?

3. What is the atomic mass of the atom pictured?

4. How many electrons are in the atom pictured?

5. What does the nucleus of an atom contain?

6. How many protons, electrons and neutrons does an neutral atom of Calcium have? Its atomic number is 20 and the mass number is 40.

7. What is the atomic number?

8. A positively charged particle found in the nucleus is called a

9. Electrons are subatomic particles that exist

10. Neutrons have almost exactly the same mass as