Which Group is Correct

Question

Which group is correct? A) Subatomic particles located within the nucleus: protons, neutrons, electrons B) Common cations: Na⁺, K⁺, HCO3^-, NH4⁺ C) Common molecules: O2, N2, H2O D) Bases: NaOH, Na HCO3^-, HCl

Accepted Answer

Oxygen (O2), nitrogen (N2), and water (H2O) are common molecules.