Answer:
Cu²⁺(OH)⁻₂
Explanation:
Step 1: Find the symbols for the substances
For copper, see your periodic table. Copper is "Cu".
For hydroxide, see your polyatomic ions chart. Hydroxide is "OH".
Step 2: Find the charges for each element.
Copper (II)'s charge is 2, which is the roman numerals in the brackets.
Hydroxide's charge is -1.
Charges are written as superscripts. You do not need to write "1".
In formulas, write the positively charged atom first.
Cu²⁺(OH)⁻ Put brackets around hydroxide because it has 2 elements.
Step 3: Write the number of atoms.
The number of atoms that an element has is the same as its partner's charge.
The charge of copper is 2, so hydroxide has 2 atoms.
The charge of hydroxide is 1, so copper has 1 atom.
Cu²⁺₁(OH)⁻₂
You do not need to write the "1" for atoms.
Cu²⁺(OH)⁻₂
