William W. answered • 01/10/21
Math and science made easy - learn from a retired engineer
I'm going to assume that you mean VALENCE electrons (those that can participate in the formation of a chemical bond).
In looking at the Periotic Table, Calcium is in Group 2 so it has 2 valence electrons and there are three Calcium atoms so that makes 6.
Phosphorus has 5 and Oxygen has 6 and 6x4 = 24 so that makes 29 in one PO4 molecule, but there are 2 of these making 29x2 = 58.
58 + 6 = 64 valence electrons.
Robert S.
01/10/21
William W.
Sorry, I'm unsure what they mean when they say "represented". Take a look at your book an see if you see what they are defining by this verbiage. Another way to consider it is there are 6 positive charges "mixing with" 6 negative charges but that doesn't fit with the answers either so??? Perhaps someone else has an idea.01/10/21
Mohammed A.
Hahah I think al Madar school is too hard for teachers too wow grade 11 must be a struggle or the question is just starit up stupid I have the same q too I may guess or just send the stupid chem teacher an email.01/10/21
Mohammed A.
You Hahah I think al Madar school is too hard for teachers too wow grade 11 must be a struggle or the question is just starit up stupid I have the same q too I may guess or just send the stupid chem teacher an email.01/10/21
Alyazia A.
i thought that too but when i have looked at the multiple choices they are different. they were (5) (8) (13) (9)01/10/21