Electrons

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

• 1s²1p⁶2s²2p¹

• 1s²2s²2p⁶3s³

• 1s²2s²2p⁶2d³

• 1s²2s²2p⁶3s²3p¹

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

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.HS-PS4-3

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.HS-PS4-3

Which occurs if an electron transitions from n = 5 to

n = 2 in a hydrogen atom?

• Energy is absorbed, and visible light is emitted.

• Energy is released, and visible light is emitted.

• Energy is released, and visible light is not emitted.

• Energy is absorbed, and visible light is not emitted.

Tags

NGSS.HS-PS4-3

What sublevel is sulfur located in?

• s

• p

• d

• f

Tags

NGSS.HS-PS1-1

Which principal energy level change by the electron of a

hydrogen atom will cause the greatest amount of energy to be absorbed?

• n = 2 to n = 4

• n = 2 to n = 5

• n = 4 to n = 2

• n = 5 to n = 2

How many orbitals are found in the p sublevel?

• 1

• 3

• 5

• 7

How many electrons can fit in a single 3d orbital?

• 1

• 2

• 5

• 10

What is the electron configuration of this atom?

• 1s²2s⁸3s⁸4s¹

• 1s²2s²2p⁶3d⁸4s¹

• 1s²2s²2p⁶2d⁸3s¹

• 1s²2s²2p⁶3s²3p⁶4s¹