Question

what is the name of the compound with the formula crf2? what is the name of the compound with the formula cocl2? what is the name of the compound with the formula cu2o? use the references to access important values if needed for this question.

Explanation:

Step1: Name $CrF_2$

Chromium has a +2 oxidation - state here and fluorine is a halogen. The name is chromium(II) fluoride.

Step2: Name $CoCl_2$

Cobalt has a +2 oxidation - state and chlorine is a halogen. The name is cobalt(II) chloride.

Step3: Name $Cu_2O$

Copper has a +1 oxidation - state in this compound (since oxygen has a - 2 charge and there are 2 copper atoms). The name is copper(I) oxide.

Answer:

Chromium(II) fluoride
Cobalt(II) chloride
Copper(I) oxide