Chemistry homework worksheet focusing on formulas and covalent bonds.

Final Answer:
METALS lose electrons and carry a positive charge. (Group 1 is the most willing to lose electrons)
NONMETALS gain electrons and carry a negative charge. (Group 17 is the most willing to gain electrons)

H⁺ F⁻ → HF
NH₄⁺ O²⁻ → (NH₄)₂O
Mg²⁺ Cl⁻ → MgCl₂
Cu²⁺ I⁻ → CuI₂
Ba²⁺ CN⁻ → Ba(CN)₂
Ca²⁺ NO₃⁻ → Ca(NO₃)₂
NH₄⁺ Cl⁻ → NH₄Cl
Sr²⁺ F⁻ → SrF₂
Mg²⁺ O²⁻ → MgO
Fe²⁺ Br⁻ → FeBr₂
Ca²⁺ OH⁻ → Ca(OH)₂
Ba²⁺ NO₃⁻ → Ba(NO₃)₂
Al³⁺ SO₄²⁻ → Al₂(SO₄)₃
Cr³⁺ O²⁻ → Cr₂O₃
Fe³⁺ O²⁻ → Fe₂O₃
Al³⁺ NO₃⁻ → Al(NO₃)₃

Ionic bonds are always formed between a metal and a nonmetal.
Covalent bonds are ONLY formed between nonmetals.

HgO → I
CCl₄ → C
NaCl → I
AgI → I
SiO₂ → C
CO → C
HgO → I
CCl₄ → C
NaCl → I