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 …………… .

(h) Elements that do not react chemically are …………… .

(i) The Latin name of iron is …………… .

(j) The horizontal rows in the Periodic table are called …………… .

(k) The vertical columns in the Periodic table are called …………… .

(a) Atomicity refers to the number of atoms in the molecule of an element.

(b) The most abundant element in the earth's crust is oxygen.

(c) A metal which is a liquid at room temperature is mercury.

(d) The most abundant element in the atmosphere is nitrogen.

(e) A metal which is a poor conductor of electricity is lead.

(f) A diatomic gaseous element is oxygen(O₂).

(g) A liquid non-metal is bromine.

(h) Elements that do not react chemically are nobel gases.

(i) The Latin name of iron is ferrum.

(j) The horizontal rows in the Periodic table are called periods.

(k) The vertical columns in the Periodic table are called groups.