Explain why the s block in the periodic table has only two columns while the p block has six. Explain why the rows in the periodic table become progressively longer as we move down the table. For...

Explain why the s block in the periodic table has only two columns while the p block has six.

Explain why the rows in the periodic table become progressively longer as we move down the table. For example, the first row contains two elements, the second and third rows each contain eight elements, and the fourth and fifth rows each contain 18 elements.