Question

the triad of lithium, sodium, and potassium reacted vigorously with what other triad? a carbon, nitrogen, and oxygen b chlorine, bromine, and iodine c oxygen, sulfur, and selenium d beryllium, magnesium, and calcium

Explanation:

Lithium, sodium, and potassium are alkali - metals. They react vigorously with oxygen, sulfur, and selenium which are non - metals. These non - metals form compounds with the alkali - metals through ionic bonding.

Answer:

C. oxygen, sulfur, and selenium