Video Follow-Up Questions Matching: Match the terms in column A with the definitions in column B.
Column A
1. molecule
2. nucleus
3. atomic number
4. mass number
5. isotopes
6. electron
7. neutron
8. proton F
9. atom
10. element
Column B
A. Substance made of only one kind of atom.
B. The total of protons and neutrons in an atom,
C. The center of an atom.
D. A group of atoms bound to each other,
E. The total of protons in a nucleus, y
F. Particle with a positive charge.
G. Particle with no charge,
H. Particle with a negative charge.
1. Atoms with the same number of protons but different numbers of neutrons.
J. Smallest particle of an element.