Question

With reference to the first 18 elements of the modern periodic table, identify the

following:

(i) An alkali metal of period 3.

(ii) Halogen of period 2.

(iii) Noble gas of period 3.

(iv) Metalloid of period 2.

(v) Non – metal of period 3 having valency 3.​

Answer 1

Explanation:

i) Na (sodium)

ii) F (fluorine)

iii) Ar (argon)

iv) B (boron)

v) P (phosphorus)