question 7\nwhich of the following set of substances are only compounds?\nbr, ne, mg\nch4, co, hi\nu, feo…

question 7\nwhich of the following set of substances are only compounds?\nbr, ne, mg\nch4, co, hi\nu, feo, na\ncr, o, no

question 7\nwhich of the following set of substances are only compounds?\nbr, ne, mg\nch4, co, hi\nu, feo, na\ncr, o, no

Answer

Brief Explanations:

A compound is a substance made up of two or more different elements chemically combined. In the first option, Br (bromine), Ne (neon), and Mg (magnesium) are elements. In the third option, U (uranium) and Na (sodium) are elements, and FeO is a compound. In the fourth option, Cr (chromium) and O (oxygen) are elements, and NO is a compound. In the second option, CH₄ (methane), CO (carbon - monoxide), and HI (hydrogen iodide) are all compounds as they are composed of different elements.

Answer:

CH₄, CO, HI