Ions and Atoms Worksheet

Ions and Atoms: The Building Blocks of Matter

Read each question carefully and answer to the best of your ability. Use the provided space for your responses.

1. Which subatomic particle carries a positive charge?

2. An atom that has gained or lost electrons is called an:

3. The atomic number of an element is determined by the number of   in its nucleus.

4. Atoms are neutrally charged because they have an equal number of protons and  .

5. A positively charged ion is called a  , while a negatively charged ion is called an  .

6. Draw a simple Bohr model diagram of a neutral Lithium atom (Atomic number = 3, Mass number = 7). Label the protons, neutrons, and electrons.

7. Explain the difference between an atom and an ion. Provide an example of how an atom can become an ion.

8. All atoms of the same element have the same number of neutrons.

9. The mass number of an atom is the sum of its protons and electrons.

Match the subatomic particle with its description.