Atomic Structure

Front

What is the mass number of an atom?

Back

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

Front

How do you calculate the mass number?

Back

Mass number = Number of protons + Number of neutrons.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

How does the atomic number relate to the identity of an element?

Back

The atomic number uniquely identifies an element; each element has a different atomic number.

Front

What is the relationship between protons and electrons in a neutral atom?

Back

In a neutral atom, the number of protons equals the number of electrons.

Front

What is a neutron?

Back

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

Front

What is a proton?

Back

A proton is a positively charged subatomic particle found in the nucleus of an atom.

Front

What is the significance of the element key?

Back

The element key provides information about the number of protons, neutrons, and electrons in an atom.

Front

What is the difference between mass number and atomic number?

Back

The mass number is the sum of protons and neutrons, while the atomic number is just the number of protons.

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.