The alkali metas form salt-like hydrides by the direct synthesis at elevated temperatures.The thermal stability of these hydrides decreases in which of the following order? a)NaH>LiH>KH>RbH>CsH b)LiH>NaH>KH>RbH>CsH c)CsH>RbH>KH>NaH>LiH d)KH>NaH>LiH>CsH>RbH
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i don't know.look some where else potta.
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