Given below are four elements with their atomic numbers:

CBSE Class 10 CBSE Class 10 Science
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1

Given below are four elements with their atomic numbers:

(a)Identify the elements which belong to the same group of the Modem Periodic Table.
(b) Arrange the given elements in decreasing order of atomic size.
© Write the formula of the oxide of B.
(d) Which of the above elements is a metalloid ?

2

(a) B and C (b) B>D>A>C
© ${{B}_{2}}$O (d) D