CBSE Class 10 Science 2020 Delhi Set 1

Question : 26 of 30

Marks: +1, -0

The position of certain elements in the Modern Periodic Table are shown below.**

Group → ↓ Period	1	2	13	14	16	18
1	G					H
2	A		I		B	C
3		D		E		F

Using the above table answer the following questions giving reasons in each case :
(i) Which element will form only covalent compounds?
(ii) Which element is a non-metal with valency 2 ?
(iii) Which element is a metal with valency 2 ?
(iv) Out of

{\H}, {\C}

and

{\F}

which has largest atomic size ?
(v) To which family does

{\H}, {\C}

and

{\F}

belong?
OR
Define atomic size. Give its unit of measurement. In the modern periodic table what trend is observed in the atomic radius in a group and a period and why is it so ?

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