# Chapter 2 - Atoms, Molecules, and Ions - Additional Exercises - Page 79: 2.104a

nickel (II) oxide $2^+$

#### Work Step by Step

$NiO$ $Ni$ is nickel. $O$ is oxygen, which his called oxide when naming compounds. Oxygen has a charge of -2. The compound is neutral, so the charge/oxidation number of the nickel element was +2. The name is written as element(oxidation number) element so $NiO$ is nickel (II) oxide.

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