What is the chemical symbol for sodium?, Na, So, S, What is the chemical symbol for calcium?, K, Ca, C, What is the chemical symbol for chlorine?, Cl, Ch, Cr, What is the chemical symbol for oxygen?, Ox, Og, O, What is the chemical symbol for hydrogen?, Hy, H, Hg, What is the chemical symbol for nitrogen?, N, Ni, Nt, Which compound has the formula CH₄?, water, methane, oxygen, What is a small number written below a chemical symbol called?, formula, subscript, symbol, What represents an element using one or two letters?, molecule, symbol, valence, What is formed when two or more atoms join together?, molecule, subscript, chlorine, What is made from two or more different elements?, compound, oxygen, formula, In which bond do atoms share electrons?, ionic bond, metal bond, covalent bond

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