Finals Review 1

Front

What defines an element?

Back

An element is defined by its number of protons.

Front

Which subatomic particle determines the type of element?

Back

The proton.

Front

What is the atomic number of an element with 41 neutrons and a mass number of 80?

Back

39.

Front

What happens when you add or subtract neutrons from an element?

Back

It changes into an isotope.

Front

How many neutrons does lithium have if its mass number is 7 and atomic number is 3?

Back

4.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus.

Front

What is an ion?

Back

An ion is an atom that has gained or lost one or more electrons, resulting in a charge.

Front

What is the difference between isotopes of an element?

Back

Isotopes have the same number of protons but different numbers of neutrons.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

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

Back

Number of neutrons = Mass number - Atomic number.