Explain how elements are arranged on the periodic table. What does the table tell you when you read it like sentences in a book - left to right, and to bottom.
Elements are arranged according to their atomic number in increasing order.
When we move left to right we move along a period.The period in the periodic table tell us about the principal quantum number,(n).
When move from top to bottom we are moving in group. The group in the periodic tabletell us about the number of the valence electrons present in the valence shell of the elements of the particular group.
