Anybody, me! i'm a sophomore in high school and chemistry is killing ! i don't wanna fail, but i know that i can't do it alone, i need your !

first one is the correct answer

the density(ratio between mass and volume as m/v) decreases from top to bottom in periodic table group as the size increases and nuclear charge decreases. but in periods density increases from left to right as atom size decreases and nuclear charge increases.

2b2t

explanation:

2b2t

water and alcohols have similar properties because water molecules contain hydroxyl groups that can form hydrogen bonds with other water molecules and with alcohol molecules, and likewise alcohol molecules can form hydrogen bonds with other alcohol molecules as well as with water.