Study the following table in which positions of six elements A, B, C, D, E and F are shown as they are in the modern periodic table:

CBSE Class 10 CBSE Class 10 Science
,
1

Study the following table in which positions of six elements A, B, C, D, E and F are shown as they are in the modern periodic table:

image
image.png714×131 39.4 KB

On the basis of the above table, answer the following questions :
(i) Name the element which forms only covalent compounds.
(ii) Name the element which is a metal with valency three.
(iii) Name the element which is a non-metal with valency three.
(iv) Out of D and E, which is bigger in size and why ?
(v) Write the common name for the family to which the element C and F belong.

2

(i) E (Silicon).
(ii) D (Aluminium)
(iii) B (Nitrogen)
(iv) D (Aluminium) has larger size than E (silicon) because atomic size decreases across the period.
(v) Aluminium Nitride (DB) or, AIN.