13 - Periodic table
14 - Dimitri mandeleev
15 - groups
Mark me brainiest pls it right answer
<span>N = +3, H = +1 ,Cl = -1
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Answer: its 15 its none of those
Explanation:
D:
When electrons are gained, the charge of the atom decreases.
When you are given an atom with a charge, the oxidation of that atom is the charge. So by going from a Cr^3+ (Oxidation Number = 3) to a Cr^2+ (Oxidation Number = 2), the Oxidation Number thus decreases.
Answer:are there any answer option? cause i know but i have to make sure
Explanation: