Atoms STAAR Test

The

identity of an atom comes from:

• electrons

• neutrons

• protons

• valence electrons

Reactivity

of an atom comes from

• Electrons

• neutrons

• Protons

• Valence Electrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Why do atoms react?

• To gain or lose electrons

• fill the outer shell

• to become stable

• All of these are true

Tags

NGSS.MS-PS1-5

The charge of a neutron

• Negative

• positive

• neutral

• magnetic

Charge of a proton

• Negative

• Positive

• Neutral

• Magnetic

Charge of an electron

• negative

• positive

• neutral

• magnetic

Tags

NGSS.HS-PS2-5

The number of energy levels an atom has relates to

• the group number

• the period number

• the atomic number

• the mass number

The number of valence electrons relates to

• the period number

• the last digit of the group number

• the mass number

• the atomic number

Calculate the number of protons

• 10

• 20

• 10.18

• 20.18

Tags

NGSS.MS-PS1-1

Calculate the number of neutrons

• 15

• 15.974

• 16

• 31

Tags

NGSS.MS-PS1-1