Electron Configuration Review

What is the atomic number of this atom? Options: 2, 4, 6, none of the above

What is the atomic mass of this atom?

2

4

6

none of the above

How many electrons does Si contain?

What element is this? Options: Sodium (Na), Phosphorous (P), Nitrogen (N), Sulfer (S)

What element is this? Options: Carbon (C), Hydrogen (H), Aluminum (Al), Lithium (Li)

Which of the following figures of the Bohr's model are incorrect? Options: A and B, B and C, B and D, A and D, None

Which orbital notation represents oxygen?

How many electrons can an orbital hold?

What element matches this electron configuration? 1s²2s²2p⁶3s²

What is this element? 
[Ar]4s²
Options: Calcium, Sodium, Scandium, Titanium