Etc.
Shells
Orbitals
Whats Missing
100

What is this element whose Electron Config. ends with 2s^2

Beryllium

100

Cs is in what shell?

6

100

What Block is Ru in?

D

100

What's Missing Carbon (2p_)

200

What is this element whose Electron Config. ends with 6s^2

Barium

200

Sb is in what shell?

5

200

What Block is Li in?

s

200

Whats Missing K ( _S^1)

4

300

What is this element whose Electron Config. ends with 3p^4

Sulfur

300

W is in what shell?

5

300

What Block is He in?

s

300

Whats Missing Lu ( 5_^1)

D

400

What is this element whose Electron Config. ends with 4f^4

Neodymium

400

Pm is in what shell?

4

400

What Block is Th in?

f
400

Whats Missing Na ( 3S^1)

Nothing

500

What is this element whose Electron Config. ends with 5d^2

Hafnium

500

Lr is in what shell?

6

500

What Block is Rn in?

p

500

Whats Missing Ti ( 3d^_)

2