Question

Consider the following statements.
(I) Element with atomic number $43$ belongs to $d-$block.
(II) ${}_{64}Gd$ is present in group $3$.
(III) Se has two unpaired electrons in p-subshell.
The correct statement(s) is/are

• A. Only (III)
• B. Only (I) and (II)
• C. Only (I) and (III)
• D. (I), (II) and (III)

Answer 1

The correct option is D (I), (II) and (III)

$Gd$ is present in $f-$block.