Question

Lithium and beryllium show anamolous bheaviour form their respective group why 1

Answer 1

they have various reasons
$\\ they \: have \: small \: size \: in \: its \: group \\ 2 \: they \: have \: high \: electronegativity \: \\ 3 \: have \: high \: ionisation \: enthalpy \:$
these are some reason