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Sodium and bromine form an ionic bond. The resulting compound, sodium bromide, is held together because...

Select one:
a. oppositely charged ions attract.
b. electrons are shared.
c. protons stay in the nucleus.
d. positively charged ions attract.

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DᴀʀᴋPᴀʀᴀᴅᴏx

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Sodium is a highly reactive alkali metal and it looses an electron to gain a positive charge on it and bromine is a halogen that is highly resctive as well and it gains a negative charge by doing so.

And hence they form ionic bond, and the compound is held together by the attraction between the two charged ions.

So, correct choice is : A. oppositely charged ion attract.

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