A) heating a pan of water until the water is all gone because then it would change from a liquid top a gas.
D) melting ice because u can freeze the “ice” back into that state of matter this is called a physical change. HOPE THIS HELPED
Covalent compounds share with each other, whilst Ionic compounds take from each other.
Covalent compounds are composed of 2 or more NONMETALS.
So, it would be CO, since the rest of the compounds contain metals in them.
Matter and energy, and both these things are made up of atoms