Question

If you were asked to describe metals and magnetism you could say
A. non paired electrons spin in opposite directions in all metals creating magnetic field
B. Metals are magnets because they have more ellectrons than non magnetic materials.
C. Metals can become magnetic if they have many spinning electrons that create magnetic fields.
D. the electrons in some metals pair up to create a magnetic field.

Answer 1

Gawd ! What a phrasing of a question.
Metals have free electrons - conduction electrons which is partly why metals are metals - they conduct electric currents, which are free electrons on the move.
Electrons also have (quantum mechanical) SPIN, or at least that's what I've been told, and the SPIN has an associated MAGNETISM. What they'd call a "magnetic dipole moment" - actually, I think that for single electron the magnetic moment is the BOHR MAGNETON, although I think that the BH is derived from a single electron orbiting in a HYDROGEN atom.
If an EXTERNAL magnetic field can LINE UP - very roughly speaking - the electron spins, then their magnetisms will come together to make a PARAMAGNET. That's a substance which can be attracted to a bar magnet, BUT OF ITSELF wouldn't attract other paramagnets (a clumsy way of saying that it has no REMANENCE, and is not a FERRO MAGNET).
Looking at the list again, yes C seems OK, it's what I've tried to say above is a paramagent.
C. Metals can become magnetic if they have many spinning electrons that create magnetic fields.
D also seem ok because if the electron spins DO pair up, and there's a fair few of them, then their magnetism will produce a magnetic field.
D. the electrons in some metals pair up to create a magnetic field.
Comparing my logic to the answers offered, I'd end up guessing between C and D. Afterwards, I'd talk to my "friends" and see what the overall opinion of the wording of the question is. But, that's just me.
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