what is the formula for calcium oxide?\ncao2\nca2o\ncao\nca2o2\nnone are correct\nquestion 4 (1 point)\nwhat…

what is the formula for calcium oxide?\ncao2\nca2o\ncao\nca2o2\nnone are correct\nquestion 4 (1 point)\nwhat is the correct name for mgcl2?\nmagnesium ii chloride\nmagnesium dichloride\nmagnesium chloride ii\ndimagnesium chloride\nmagnesium chloride

what is the formula for calcium oxide?\ncao2\nca2o\ncao\nca2o2\nnone are correct\nquestion 4 (1 point)\nwhat is the correct name for mgcl2?\nmagnesium ii chloride\nmagnesium dichloride\nmagnesium chloride ii\ndimagnesium chloride\nmagnesium chloride

Answer

Brief Explanations:

Calcium has a +2 oxidation state and oxygen has a -2 oxidation state. In calcium oxide, the charges balance in a 1:1 ratio, giving the formula CaO. For MgCl₂, magnesium is a Group - 2 element with a +2 oxidation state and chlorine is a halogen with a -1 oxidation state. In naming ionic compounds with main - group metals like magnesium, we don't use Roman numerals or prefixes like "di -" for the metal or non - metal in simple binary ionic compounds. The name is magnesium chloride.

Answer:

  1. C. CaO
  2. E. Magnesium Chloride