Atomic Structure Practice

What is an atom’s nucleus made of?

• protons and electrons

• protons only

• protons and neutrons

• neutrons only

How many electrons will a neutral atom of carbon have if its nucleus has 6 protons and 8 neutrons?

• 2

• 6

• 8

• 14

An element with 5 protons, 6 neutrons, and 8 electrons has an atomic number of

• 5

• 6

• 8

• 11

Tags

NGSS.MS-PS1-1

An element with 5 protons, 6 neutrons, and 8 electrons has a mass number of

• 5

• 6

• 8

• 11

Atoms of the same element that have different numbers of neutrons are called

• molecules

• ions

• protons

• isotopes

Which particles determine the atomic number of an element?

• Protons only

• Neutrons and protons

• Neutrons only

• Protons and electrons

The total number of neutrons in the nucleus of any atom is equal to the

• mass number of the atom

• atomic number of the atom

• atomic number minus the mass number

• mass number minus the atomic number

Two different isotopes of an element have different

• numbers of neutrons

• number of protons

• atomic numbers

• nothing is different about them

An unstable nucleus results from too many or too few _______.

• neutrons

• protons

• electrons

• radons

Tags

NGSS.HS-PS1-8

Match the following

• A subatomic particle with a postive charge

• Electron

• A subatomic particle with a negative charge

• Neutron

• The subatomic particle with no charge (therefore electrically neutral)

• Proton

Tags

NGSS.MS-PS1-1