1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Basic chem question?

  1. Dec 3, 2009 #1
    If an element Z forms a compound with the formula AgZ, which of the following is a correct chemical formula?


    I dont really understand this at all and there is gonna be decent amount of them on my final exam! please any help
  2. jcsd
  3. Dec 3, 2009 #2


    User Avatar
    Homework Helper

    Think charges. Since AgZ is an ionic compound, what charge must the Z have? How does this charge tell you whether a certain compound (CaZ2, Al2Z3, etc) is possible?
  4. Dec 3, 2009 #3

    Ag ion has a charge of +1 which mean the charge on the Z anion must be -1.

    Ca ion has a charge of +2, so it takes two Z anions to bond with it.
    Last edited: Dec 3, 2009
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook