assuming the octet rule is obeyed how many covalent bonds will a nitrogen atom form to give a formal charge of zero

3

Explanation:

In a nitrogen atom, since the no, of electrons is equal to its no. of protons, it has 7 electrons.

The electron configuration is 2, 5. (the first shell can only hold 2 electrons)

In each covalent bond, 2 electrons are shared between 2 atoms. usually, both atom contribute one electron. (unless it's dative covalent bond, which is not important at this point).

To obey octet rule, the outermost electron shell must have 8 electrons. Which means, the nitrogen atom need 3 more electrons to achieve that.

So with 3 covalent bonds, the nitrogen can get share 3 of its electrons, and obtain 3 more from the other atom(s). It won't lose electrons because covalent bonds exist between shared electrons, unlike ionic bonds.

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

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