Ions, cations and anions

Electron shells can be thought of as which vegetable?

• Carrot

• Sweet potato

• Capsicum

• Onion

Tags

NGSS.MS-PS1-1

Electrons repel each other and move frantically in their shells because

• Their positive charges repel

• Their negative charges attract

• Their negative charges repel

• Their positive charges attract

Tags

NGSS.HS-PS1-3

NGSS.HS-PS2-4

NGSS.HS-PS3-5

Electron shells are numbered 1, 2, 3, 4. Their corresponding lettered shells are:

• N, O, P, Q

• K, L, M, N

• L, M, N, O

• A, B, C, D

In ascending order, the maximum number of electrons each shell can hold is

• 2, 8, 8, 32

• 2, 8, 18, 32

• 2, 6, 8, 32

• 2, 3, 4, 5

Tags

NGSS.MS-PS1-1

Calcium (Ca) has 20 electrons. Its electron configuration is

• 2, 8, 8, 2

• 20

• 2, 2, 8, 8

• 2, 8, 6, 4

Tags

NGSS.MS-PS1-1

Boron (B) has 5 electrons. Its electron configuration is

• 5

• 2, 2, 1

• 1, 2, 2

• 2, 3

Tags

NGSS.MS-PS1-1

An element with the electron configuration 2, 1 is in which group number?

• 1

• 2

• 3

• 4

An ion is

• Also a compound

• An atom that has gained or lost an electron

• An atom that has only gained electrons

• An atom where the number of protons=electrons

Cations

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

Tags

NGSS.HS-PS1-1

Anions

• Gain electrons, has an overall positive charge

• Lose electrons, has an overall positive charge

• Lose electrons, has an overall negative charge

• Gain electrons, has an overall negative charge

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2