Fill in the blanks:
$1.$ The size of $M^{3+}$ ions in the actinoid series ........... with an increase in atomic number.
$2.$ The common oxidation state of elements in the actinoid series is .......... .
$3.$ The appearance of elements in the actinoid series is like .......... .
$1.$ The size of $M^{3+}$ ions in the actinoid series ........... with an increase in atomic number.
$2.$ The common oxidation state of elements in the actinoid series is .......... .
$3.$ The appearance of elements in the actinoid series is like .......... .
(N/A) $1.$ The size of $M^{3+}$ ions in the actinoid series decreases with an increase in atomic number due to actinoid contraction.
$2.$ The common oxidation state of elements in the actinoid series is $+3$.
$3.$ The appearance of elements in the actinoid series is like metallic/silvery.
$2.$ The common oxidation state of elements in the actinoid series is $+3$.
$3.$ The appearance of elements in the actinoid series is like metallic/silvery.
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