... formula In part (a), for example, Hg~+ + 2Cl- = (2+) + 2(- 1) = 0; in part (b), (+ 2) + (- 2) = 0; and in part (c), 2(+1) + (-2) = O Solution The formulas are (a) Hg2Cl b (b) PbCr 04, and (c) ... 28, A = 64, (c) Z = 50, A = 115, (d)Z= 20, A = 42 Write the appropriate symbol for each of the following isotopes: (a) Z = 74, A = 186; (b) Z = 80, A = 201 , (c) Z = 34, A = 76, (d) Z = 94, A = ... likely to be ionic? Which are likely to be molecular? CH4, NaBr, BaFb CCI4, ICl, CsCl, NF3 2.75 Name the following compounds: (a) KH2P 04, (b) K HP0 , (c) HBr (gas), (d) HBr (in water), (e) Li2C0...