Atomic Structure and Radioactivity

Front

What is the rough size of an atom?

Back

~ 10-10 m

Front

What is the rough size of a nucleus?

Back

~ 10-15 m

Front

What three particles make up atoms?

Back

Protons, neutrons, and electrons.

Front

What particles are in the nucleus?

Back

Protons and neutrons.

Front

What is the charge and relative mass of a proton?

Back

Positive charge, relative mass of 1.

Front

What is the charge and relative mass of a neutron?

Back

Neutral charge, relative mass of 1.

Front

What is the charge and relative mass of an electron?

Back

Negative charge, relative mass of 11800.

Front

How are the electrons arranged within an atom?

Back

In energy levels at different distances from the nucleus.

Front

What happens to the arrangement of electrons when an atom absorbs electromagnetic radiation?

Back

An electron will move from a lower energy level to a higher energy level.

Front

What change to the arrangement of electrons in an atom when it emits electromagnetic radiation?

Back

An electron moves from a higher energy level to a lower energy level.