Explain the following

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(a) Elements A and D are cations because they have less than 4 electrons in their valence shell which they will donate to become electropostive .

(b) Elements C and E are anions because they have 7 electrons in their valence shell and can accept one electron to become electronegative

(c) B is an inert gas as it has 8 electrons in its valence shell and can neither loose electrons or gain electrons to become a cation or anion
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