which type of radioactive emission has a positive charge and weak penetrating power?

Question

1) Hg(l)
2) H20 (l)
3) NaCl (s)
4) C6H12O6 (s)

Answer 1

Alpha rays.

Answer 2

I don't understand the question. I thought you would provide a list of radioactive emissions like gamma rays, alpha particles, neutrons, beta particles, etc. What you provided are compounds.