Sunday
April 20, 2014

Homework Help: Physical Science

Posted by mysterychicken 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

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