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Orlov [11]
3 years ago
8

The atomic radius of main group elements generally increases down a group because

Chemistry
1 answer:
Pachacha [2.7K]3 years ago
8 0

The atomic radius of main group elements generally increases down a group because as there are more electrons they are farther away from the nucleus and the electrons closer to the nucleus shield the outer electrons from the protons for attraction.

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Which ion would represent the ion of an element from Group 2A?
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Answer:

E²⁺

Explanation:

The group two contain alkaline earth metals.

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They lose two valance electrons to complete the octet.

When they lose the two valance electrons they form cation X²⁺.

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The oxidation state of halogens are -1, while the elements of group two A shows +2 that's why two atoms of halogen are combine with one atom of alkaline earth metals and make the compound overall neutral.

All the alkaline earth metals have similar properties.

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