metals with low ionisation energy posses
(a) ionic bond
(b) covalent bond
(c) metallic bond
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(b) covalent bond explanation
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Alkali metals are group one elements with only one electron in its outermost valency shell, as we move from left to right number of electrons in valence shell increases and volume decreases, hence value of first ionisation energy of alkali metals is lowest in their respective period.
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