Which statements are true about all waves? It’s caused by a disturbance.
It requires a medium to travel.
It carries energy.
It carries matter.

It is caused by a disturbance

It carries energy

Explanation: Had the same question and I got it correct. :D

a graduated cylinder.

explanation:

the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.