Atomic Structure Test

Which particles are found in the nucleus of an atom?

• Protons and electrons

• Electrons and neutrons

• Protons and neutrons

• Protons only

The number of protons in an atom determines its:

• Atomic number

• Mass number

• Charge

• Isotope

Which particle has a negative charge?

• Proton

• Neutron

• Electron

• Nucleus

Oxygen has an atomic number of 8. How many protons does it have?

• 4

• 8

• 16

• 18

Tags

NGSS.MS-PS1-1

If Carbon has a mass number of 12 and an atomic number of 6, how many neutrons does it have?

• 6

• 12

• 18

• 24

Sodium has an atomic number of 11 and a mass number of 23.

• Atomic number: 11, Mass number: 23

• Atomic number: 23, Mass number: 11

• Atomic number: 12, Mass number: 23

• Atomic number: 11, Mass number: 22

How many protons does Sodium have?

• 11

• 12

• 10

• 13

How many neutrons does Sodium have?

• 12

• 10

• 11

• 13

How many electrons does a neutral Sodium atom have?

• 11

• 10

• 12

• 23

A Magnesium atom has an atomic number of 12 and a mass number of 24. Protons = ?

• 12

• 24

• 6

• 18