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Question
Give reason:
Alkali and alkaline earth metal compounds usually form electrovalent compounds.
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Solution
Alkali metals and alkaline earth metals have 1 and 2 valence electrons, respectively, in their outermost shell.
They can lose electrons to atoms of non-metals to form an electrovalent compound.
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Noble gas with duplet arrangement of electrons.
Comment on the (i) reactivity (ii) colour (iii) physical state of group 17 elements.
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Alkali metals are kept in an inert solvent.
Write a short note on the following type of element –
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The most reactive halogen from group 17.
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The group from the groups 1 [IA], 2 [IIA], 16 [VIA] and 7 [VIIA] whose elements are most electronegative.
