What are these means in Periodic Table;
Group
Period
Block

1. Group: Groups shows the number of valence electrons and are shown in columns on the periodic table.

2. Period: Periods show the number of energy levels each element has and are shown in rows on the periodic table (up and down).

3. Blocks are show the amount of orbitals each element has. There is an s block, d block, p block, and f block.