What two rocks make up the earth and what are they made of?

Give an example of a collision in real life. use the law of conservation of energy to describe the transfer of momentum. be sure and discuss the momentum before and after the collision occurs. you will need at least 3 sentences to thoroughly answer this question.

If element x has 99 protons how many electrons does it have

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o