Unit 1 Test

The planetary model, with electrons orbiting the nucleus in fixed paths.

The plum pudding model, with electrons embedded in a positively charged sphere.

The quantum mechanical model, where electrons exist in probability clouds.

A model with a small, dense nucleus surrounded by electrons.

16

32

48

17

100.8 amu

101.2 amu

101.6 amu

102.0 amu

Alpha decay

Beta decay

Gamma decay

Positron emission

Fusion splits a large nucleus; fission combines smaller nuclei.

Fusion combines smaller nuclei; fission splits a large nucleus.

Fusion absorbs energy; fission releases energy.

Fusion converts energy into mass; fission does not.

Nuclear fission

Nuclear fusion

Alpha decay

Beta decay

Using them to create fireworks.

Heating homes with geothermal energy.

Diagnostic imaging such as PET scans.

Generating electricity with wind turbines.

Number of protons

Number of neutrons

Number of electrons

Atomic number

Alpha decay

Beta decay

Gamma decay

Both Beta and Gamma decay

Protons are in the nucleus and have a positive charge.

Electrons are in the nucleus and have a positive charge.

Neutrons are in the electron cloud and have no charge.

Electrons are in the nucleus and have a negative charge.