Elements in the same group of the periodic table typically have ...

[j.rubin]

Elements in the same group of the periodic table typically have ________.
 
  A) similar mass numbers
  B) similar physical properties only
  C) similar chemical properties only
  D) similar atomic masses
  E) similar physical and chemical properties

Question 2

For the species in the reaction below, Hf is zero for ________. 2Co (s) + H2 (g) + 8PF3 (g)  2HCo(PF3)4 (l)
 
  A) Co (s)
  B) H2 (g)
  C) PF3 (g)
  D) HCo(PF3)4 (l)
  E) both Co(s) and H2 (g)

Question 3

A humectant is a moisturizing agent.
 
  Indicate whether the statement is true or false

[mohan]

Answer to Question 1

E

Answer to Question 2

E

Answer to Question 3

TRUE

[j.rubin]

Gracias!

[komodo7]

Great answer, keep it coming