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8. nuclei come closer together becuase an ionic bond is formed

9. when it loses two electrons, it becomes positively charged. For e.g, Mg becomes Mg2+ on the lose of two electrons.

The answer to the second question is that when an isolated atom is supplied with energy, it is able to lose an electron and become a positive ion with +1 charge!

If it is supplied with still larger amount of energy, it can also lose another electron to attain the +2 charge. The amount of energy has a specific value and is known as ionization energy and the energy required to remove first electron is called first ionization energy and then second and so on.

As far as first question is concerned, it is explained as when a nucleus loses an electron, it gains positive charge. Then, the electrons are accepted by another atom and it gains a negative charge!

when both these oppositely charged particles come together, they attract each other as always happen that oppositely charged bodies attract each other and an ionic bond is formed between them!

8. none

9. by losing 2 electrons

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8. absolutely none

9. lose two electrons.