Atoms are like the letters of the alphabet the compounds they make are like words.
S + 2e⁻ → S²⁻ (sulfur will gain electrons)
Mg - 2e⁻ → Mg²⁺ (magnesium will lose electrons)
Magnesium is a metal which tends to give electrons which are received by the sulfur, which is a nonmetal and tends to gain electrons.
Answer:
Hello! I think the answer is morphology
A fish is a living thing and a rock is not