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The first(IE(1)) and second (IE(2))Ioniz...

The first(IE_(1)) and second (IE_(2))Ionization energies (KJ/mol) of a few elements designated by roman numerals are given below.Which of these would be an alkali metal?

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Non-metals have high yet comparable ionization energies. Their values are certainly not as high as those of inert gases but they do show a marked tendency to accept electrons in place of losing them. Here element IV seems to be a reactive non-metal (3) Element I is certainly a noble gas. The values of IE are high as compared to any other. Such elements are non- reactive and do not participate in chemical reactions.
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