Electron Configuration

What does the period number tell you?

How many electron shells the element has

What does the group number tell you?

How many electrons an element has in its outer electron shell.

What are the blocks in the periodic table split into?

S-block, d-block and p-block

What do s-block elements have?

An outer shell electron configuration of S1 or S2

What do p-block elements have?

An outer shell configuration of S2 p1 to s2 p6

What do d-block elements have?

Electron configurations in which d sub-shells one being filled.

What do you do it you don't always write sub- shell in the order they're filled?

You write them in order of increasing period number.