Electrons

In the electron cloud model of the atom, what does the cloud represent?

• the limits of the electron location

• the probability of the electron location

• the average distance between the electron and the nucleus

• the minimum distance between the electron and the nucleus

Flame tests can be used to identify an element. Each element emits characteristic waves of light when it is heated in a flame. What describes how the light is produced?

• Protons in the ground state lose energy and give off light.

• Protons in the ground state gain energy and are emitted from the nucleus, giving off light.

• Electrons in the ground state lose energy and move to an excited state, giving off light.

• Electrons in the ground state gain energy, move to an excited state, and give off light when they return to the ground state.

Tags

NGSS.MS-PS4-2

The atomic number of aluminum is 13. What is the correct designation of the electron configuration of aluminum?

• 1s²1p⁶2s²2p¹

• 1s²2s²2p⁶3s³

• 1s²2s²2p⁶2d³

• 1s²2s²2p⁶3s²3p¹

Tags

NGSS.HS-PS1-1

Light is emitted when electrons

• move from one atom to another.

• collide with one another, releasing energy.

• move from a lower energy level to a higher energy level.

• move from a higher energy level to a lower energy level.

Tags

NGSS.MS-PS4-1

The negatively charged particle that is found in the rings of an atom is called a(n)

• electron

• proton

• neutron

• nucleus

A tiny, negatively charged particle that moves around the nucleus of an atom in clouds/shells is called:

• An electron

• A proton

• A neutron

• A shell

How many electrons are in an electrically neutral atom of boron?

• 5

• 8

• 6

• 3

Tags

NGSS.MS-PS1-1

How many total electrons does this atom have?

• 10

• 11

• 13

• 18

Tags

NGSS.MS-PS1-1

Electrons are___________

• Extremely small even in comparison to protons.

• part of the nuclues.

• Super Positive, like cheerleaders!

• very large

Tags

NGSS.MS-PS1-1

The image shows the periodic grid for POTASSIUM. How many ELECTRONS are found in a potassium atom?

• 19

• 39

• 20

• Impossible to tell

Tags

NGSS.MS-PS1-1