Question

(i) What do you understand by the term period?​

Answer 1

A period is the name given to a horizontal row of the periodic table. The periodic table has seven periods. Apart from period 1, every period begins with an alkali metal and ends with a noble gas. Period 1 contains only two elements: hydrogen and helium

Answer 2

Answer:

A period is the name given to a horizontal row of the periodic table. The periodic table has seven periods. Apart from period 1, every period begins with an alkali metal and ends with a noble gas. Period 1 contains only two elements: hydrogen and helium.