Atomic Theory, Structure, and Mass

Front

What does the atomic number of an element represent?

Back

The atomic number represents the number of protons in an atom.

Front

Which particles make up the nucleus of an atom?

Back

The nucleus of an atom is made up of protons and neutrons.

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is the most abundant isotope of Nitrogen?

Back

The most abundant isotope of Nitrogen is Nitrogen-14.

Front

What is the mass number of an element?

Back

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

Front

What is the mass number and name of an element with 8 protons and 8 neutrons?

Back

The mass number is 16 and the element is Oxygen.

Front

What is the difference between atomic mass and mass number?

Back

Atomic mass is the weighted average of an element's isotopes, while mass number is the total count of protons and neutrons in a specific isotope.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.