Build an Atom PhET Simulation Questions

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.

Front

What subatomic particle determines the identity of an atom?

Back

The proton determines the identity of an atom.

Front

What happens if a proton is added to an atom?

Back

Adding a proton changes the charge, mass number, and the element/name of the atom.

Front

What determines the electrical charge of an atom?

Back

The electrical charge of an atom is determined by the number of electrons.

Front

How many neutrons are in an atom with a mass number of 37 and 17 protons?

Back

There are 20 neutrons in this atom.

Front

What is the charge of a proton?

Back

The charge of a proton is +1.

Front

What is the charge of a neutron?

Back

The charge of a neutron is 0 (neutral).

Front

What is the charge of an electron?

Back

The charge of an electron is -1.

Front

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Mass number - Number of protons.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.