For heavy elements, what is the ratio of neutrons to protons that predicts a stable nucleus? a) 1: 1 b) 1.5: 1 c) 2: 1 d) 10: 5

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene

What four properties do all waves have in common