Atoms, Ions, and Isotopes

What particles determine the mass number?

• Protons and electrons

• Electrons and neutrons

• Protons and neutrons

• Protons, neutrons, and electrons

What is the mass number of bromine?

• 35

• 45

• 80

• 79.904

Tags

NGSS.MS-PS1-1

The atomic number is equal to _.

• the number of protons

• the number of neutrons only

• the total number of protons and neutrons

• the number of protons, neutrons, and electrons

Tags

NGSS.MS-PS1-1

How many neutrons does this bromine atom have?

• 35

• 45

• 80

• 115

Tags

NGSS.MS-PS1-1

What is the mass number of this Neon atom?

• 10

• 11

• 21

• 20

Tags

NGSS.MS-PS1-1

How many electrons does this magnesium ion have?

• 24

• 12

• 10

• 14

Tags

NGSS.MS-PS1-1

What changes when an atom becomes an ion?

• The number of electrons

• The number of protons

• The number of neutrons

• Both the number of neutrons and electrons

How many neutrons does this Neon atom have?

• 21

• 11

• 10

• 12

Tags

NGSS.MS-PS1-1

What happened to this Magnesium atom to make it an ion?

• It LOST electrons

• It GAINED electrons

• It GAINED protons

• It LOST protons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the atomic number of this element?

• 12

• 24

• 23

• 35

Tags

NGSS.MS-PS1-1