Fill in the blanks
(a) ................. refers to the number of atoms in the molecule of an element.
(b) The most abundant element in the earth’s crust is ....................
(c) A metal which is a liquid at room temperature is ...................
(d) The most abundant element in the atmosphere is ............................
(e) A metal which is a poor conductor of electricity is .......................
(f) A diatomic gaseous element is ..................
(g) A liquid non-metal is ..................