Hi!
Magnets attract with opposite poles. The reason is the North pole of a magnet's magnetic lines (if that makes any sense) generally flow inwards, making it pulling in, and the South pole's magnetic lines flow outwards, pushing out. If you align two magnets with the same poles together, they will always repel, because they will be flowing in different directions.
However, if you align a north and a south pole together, they will work together, and attract.
Therefore, if you place two magnets randomly, and they're close enough, they'll align so that the north pole of one magnet faces the south pole of the other magnet, or choice A.
Answer:
E. The substituting atom must be from the same group.
Explanation:
Usually members higher-up in the group can replace or substitute lower members of a group
Answer:
Force to do a certain task over distance creates work. Work can increase energy, therefore energy does work, and distance is a kind of work. This is all I got
Explanation: