Julius went swimming at the lake. While he was playing on the shore, he found a rock and a stick, and he threw them both in the lake. The rock sank to the
bottom, and the stick floated on top of the water. What must be true about the
stick and the rock?

the rock is dencer than the water and the stick has more surface tension.

The rock is heaver so it sinks to the bottom of the lake, and the and the stick is lighter so it floats.

Hope this helps☺️

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

if you need further assistance, let me know: )

~ trueboss72