The highest occupied energy level of the group 2 elements radius is...

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The highest occupied energy level of the group 2 elements radius is \( 7 s^{2} \), which of these statements is likely to be incorrect?
P
(a) The element will show an oxidation state of \( +\mathrm{II} \) in all its compounds
W
(b) The element will decompose water, liberating hydrogen
(c) Hydroxide of the element will be amphoteric
(d) Metal carbonate is relative stable at higher temperature than calcium carbonate
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