Isotopes and Atomic Mass Review

Front

What subatomic particle has a negative charge in the atom?

Back

Electron

Front

Isotopes are atoms of the same element that have the same number of __________ but different number of __________.

Back

protons, neutrons

Front

How many neutrons does the isotope of lithium have?

Back

5

Front

Isotopes have different numbers of __________.

Back

neutrons

Front

An atom is electrically neutral when __________.

Back

protons and electrons are the same

Front

Define isotopes.

Back

Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number.

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

How do you calculate the atomic mass of an element?

Back

Multiply the mass of each isotope by its natural abundance (as a decimal) and sum the results.

Front

What is the difference between mass number and atomic mass?

Back

Mass number is the total number of protons and neutrons in an atom's nucleus, while atomic mass is the average mass of an element's isotopes.

Front

What is a neutron?

Back

A neutron is a subatomic particle found in the nucleus of an atom, with no electric charge.