Which is true about one formula unit of CaBr2?

Question

Which is true about one formula unit of CaBr₂?

A) There is one 1 Ca atom and 1Br₂ molecule

B) There is one CaBr₂ molecule

C) There is 1 Ca atom and 2 Br atoms

D) There is 1 positive Ca ion and 2 negative Br ions

E) There is 1 positive Ca ion and 1 negative Br ion.

Answer 1

Which is true about one formula unit of CaBr₂?

A) There is one 1 Ca atom and 1Br₂ molecule - false. There is not 1 Br₂ molecule

B) There is one CaBr₂ molecule - sort of true, but we don't refer to it as a molecule. It is a formula unit.

C) There is 1 Ca atom and 2 Br atoms -TRUE

D) There is 1 positive Ca ion and 2 negative Br ions - TRUE

E) There is 1 positive Ca ion and 1 negative Br ion. - False. There are 2 Br ions.