Free The Chemistry - Topics - Atomic Structure

1. List the three statements that make up the modern atomic theory.

All matter is composed of atoms; atoms of the same element are the same, and atoms of different elements are different; atoms combine in whole-number ratios to form compounds.

2. Which is larger, a proton or an electron?

A proton is larger than an electron.

3. What are the charges for each of the three subatomic particles?

proton: 1+; electron: 1−; neutron: 0

4. Where is most of the mass of an atom located?

In the nucleus of the atom

Atomic Structure

1. List the three statements that make up the modern atomic theory.

2. Which is larger, a proton or an electron?

3. What are the charges for each of the three subatomic particles?

4. Where is most of the mass of an atom located?

5. Sketch a diagram of a boron atom, which has five protons and six neutrons in its nucleus.