Semester 1 Final Review

Front

Convert 40 ounces to pounds. (16oz = 1lb)

Back

2.5 pounds

Front

What charge does an electron have?

Back

Negative

Front

When is light emitted when electrons change energy levels?

Back

When an electron falls back to the ground state.

Front

The three main subatomic particles are electrons, protons and ____________.

Back

neutrons

Front

An atom has 10 protons, 15 neutrons and 10 electrons. What is its mass number?

Back

25

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of a neutron?

Back

Neutral

Front

What happens to an electron when it absorbs energy?

Back

It jumps to a higher energy level.

Front

What is the relationship between mass and weight?

Back

Weight is the force exerted by gravity on an object, while mass is the amount of matter in the object.