What does the notation 1s² mean?

• There are two electrons in energy level 1, sublevel s.

• There is 1 electron in energy level 2, sublevel s.

• There are two electrons in energy level s, sublevel 1.

• There is 1 electron in energy level 1, sublevel s.

Tags

NGSS.HS-PS1-1

What is Helium's energy level and sublevel?

• Energy level 1, sublevel s.

• Energy level 1, sublevel p.

• Energy level 18, sublevel s.

• Energy level 2, sublevel s.

Tags

NGSS.HS-PS1-1

How do you determine the number of electrons in the last sublevel ?

• You count using your periodic table.

• All s end in 2, all p end in 6, all d end in 10, and all f end in 14.

• You have to make an educated guess.

Tags

NGSS.HS-PS1-1

What is the final electron configuration for chlorine?

• 1s²2s²2p⁶3p⁵

• 3s²3p⁵

• 1s²2s²2p⁶3s²3p⁵

Tags

NGSS.HS-PS1-1

What should all the superscripts add up to equal?

• atomic mass

• atomic number

• mass number

What energy level is manganese's d electrons found in?

• 4

• 3

• 2

What is the next thing she's about to write?

• 4s²

• 3d⁵

• 3p⁶

Tags

NGSS.HS-PS1-1

For the d sublevel, how do you find energy level? 

Hint! Look at what is written above the d block.

• Period number minus 1.

• Same as Period number.

• Group number minus 1.

• Period number minus 2.

After 4s is filled, which energy level/sublevel fills next?

• 3d

• 4d

• 4p

• 4f

How many electrons will go in 3d for manganese?

• 5

• 10

• 3

Tags

NGSS.HS-PS1-1