7. What causes some metallic bonds to be stronger than others? A. the number of donated valence electrons

B. the number of metallic bonds

C. the fineness of the metal

D. the number of metal ions

10 points! will mark brainiest! in a heat engine if 1,000 j of heat enters the system and the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2,000 j 1: write the equation 2: list out your known variables 3: plug the numbers into the equations 4: solve 5: write your solution statement that includes initial energy and final energy added you so much!