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Posted by on Friday, May 22, 2009 at 11:34am.

Need help with these questions:

1.When a calcium atom forms an ion, it loses two electrons. What is the electrical charge of the calcium ion?
A.-2
B.-1
C.+2
D.+1

2.Which particle builds a static electrical charge when it is transferred from one object to the other?
A.proton
B.electron
C.atom
D.molecule
I think this one might be A or B...

3.What causes nickel and certain other metals to be magnetic?
A.the influence of earth's magnetic field
B.the motion of protons in their atoms
C.their atoms have more electrons that protons
D.the pattern of electrons in their atoms
A?

Thanks
-MC

  • Physical Science - , Friday, May 22, 2009 at 11:37am

    1. What family is calcium in?
    2. If a proton moves, the atom is changed to a new material.
    3. The placement of electrons in energy orbitals results in a net magnetic moment for some atoms.

  • Physical Science - , Friday, May 22, 2009 at 11:50am

    So #3 is D?
    -MC

  • Physical Science - , Friday, May 22, 2009 at 12:11pm

    Nevermind I got the answers
    -MC

  • Physical Science - , Saturday, May 23, 2009 at 9:44am

    what grade is this

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