28. magnesium bromide is a binary ionic compound. from its formula, mgbr₂, how do you know that mg is the metal?

A metal is always the first element in a binary ionic compound.

Explanation:

Explanation:

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In this case it is an ionic union, where the metals are the ones that give up electrons and the nonmetals are the ones that accept electrons.

In this case the element that gives up electrons is Magnesium.

In addition, if we look at the periodic table it is in the groups of metals and Bromine is in the part of nonmetals.

So we can check it without mistake.

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answer: - b cells

explanation: -

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.