Atomic Structure and Particles

Front

Most of the mass of an atom is found in the ______.

Back

nucleus

Front

An element has 17 protons and 18 neutrons in the nucleus. What is the element's mass number?

Back

35

Front

What is the atomic number for an element with twelve protons?

Back

12

Front

Particles in an atom that are neutral and have no charge are 

Back

neutrons

Front

These particles orbit around the nucleus of an atom. What are they called?

Back

electrons

Front

What is the smallest unit of an element that retains the properties of that element?

Back

atom

Front

What are the three main subatomic particles of an atom?

Back

protons, neutrons, electrons

Front

What charge do protons carry?

Back

positive charge

Front

What charge do electrons carry?

Back

negative charge

Front

What is the mass number of an atom?

Back

The total number of protons and neutrons in the nucleus.