Unit 3 Review

Electrons that have not been excited are said to be at:

• high level

• base line

• set state

• ground state

For an electron to change from ground state to an excited stated it must...

• Absorb energy
• Release energy

Line emission spectrum shown below happens when

• Electron transition from lower to higher energy level.
• Electron transition from higher to lower energy level.
• Electron exist in fixed energy states
• Electron transition between different energy levels.

The unknown emissions spectra belongs to the element

• Hydrogen

• Mercury

• Neon

• Sodium

Which elements are in the unknown sample?

• A and B
• B and C
• A and D
• B and D

If an electron moves from n=4 to n=2 it ____

• absorbs energy

• releases energy

Look carefully at the picture. It shows an electron in the excited state on the left, and the electron returning to its ground state on the right. When the electron return to the ground state it emits a_______________________.

• blast of cold air

• electrostatic charge

• proton

• photon (light)

What is an excited state shell electron configuration for fluorine?

• 2-7

• 2-6

• 3-6

• 1-8

N=5 l=2

• 3s

• 4sp

• 5d

• 5p

Which of the following sub levels does not exist

• 2p

• 3d

• 2d

• 5f

• 4f