A covalent bond is _ if atoms in a molecule share their electrons unequally

POLAR

> a covalent bond is formed when two atoms SHARE electrons

(conversely, an ionic bond is when one atom donates an electron to another, more electronegative, atom)

> when there is an UNEVEN distribution of electrons/ electrons are NOT shared equally, then you have a POLAR bond where the CHARGE is not evenly distributed

(resulting in partial positive and negative sides of the molecule.. net dipole)

> POLAR covalent bonds form when there is a greater difference in electronegativity (some atoms have a greater desire to "grab" electrons to fill their octet and become more stable... for example H-F is a polar covalent bond)

the minimum amperage that the current in this wire would have to have so that its weight is completely supported by the magnetic force due to earth's field, assuming that no other forces except gravity act on it

i think the answer is a, hope this : )