Name ______________________________________________________

What are the parts of an atom?

Lesson Review

Complete the following.

1. The first scientist to suggest that atoms contain smaller particles was _________________ of England.

2. Positively charged particles in an atom are called ____________________________________

3. Bohr proposed that electrons in an atom are found in specific ___________________________

4. Negatively charged particles in an atom are called ____________________________________

5. Rutherford found that an atom is made up mostly of __________________________________

6. The center, or core, of an atom is called the ________________________________________.

7. Surrounding the core of an atom is a cloud of very small particles called __________________.

8. According to Bohr’s model, electrons move around the center of an atom in separate ____________ ,much as the planets move around the Sun.

9. Neutral particles in an atom are called ______________________________________________________ .

10. Rutherford found that ______________________________________ are located in the core of an atom.

Skill Challenge

Skills: comparing, classifying

Write yes or no in the correct columns to identify whether each statement is true

for protons, neutrons, and electrons.