Question

question 23 of 25 which of the following is a binary compound? a. nh4+ b. cao c. o2- d. h2so4

Explanation:

A binary compound consists of two different elements. NH₄⁺ is a poly - atomic ion, O²⁻ is an ion, and H₂SO₄ has three different elements (H, S, O). CaO has two elements, calcium (Ca) and oxygen (O).

Answer:

B. CaO