Atomic Structure Review

Front

What constitutes the major portion of an atom's mass?

Back

Neutrons and protons.

Front

What are the characteristics of a neutron?

Back

It has no charge and a mass of 1 amu.

Front

How do you calculate the mass number of an atom?

Back

Mass number = number of protons + number of neutrons.

Front

What is the mass number of an atom with 21 electrons, 21 protons, and 24 neutrons?

Back

45.

Front

How many protons are in a carbon-14 atom?

Back

6.

Front

What is the charge of a proton?

Back

+1.

Front

What is the charge of an electron?

Back

-1.

Front

What part of the atom contains most of its mass?

Back

The nucleus.

Front

What is the total number of neutrons in a carbon-14 atom?

Back

8.

Front

What is the significance of the atomic number?

Back

It represents the number of protons in an atom.