To break a strip of aluminum metal. Ms. Cristell bent an aluminum strip back and forth many times. She touched the metal and noticed the aluminum was getting warm where she was bending it What type of energy transformation occurs when the metal is bent back and forth? Heat energy to mechanical energy Radiant energy to heat energy Chemical energy to heat energy

The last one

Explanation:

I am pretty sure but I will delete if it is wrong

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.

am i too late?

explanation: