Calculate the percent composition by mass of each element in NACI04

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

13. a covalent bond between two atoms is likely to be polar if: a. one of the atoms is much more electronegative than the other. b. the two atoms are equally electronegative. c. the two atoms are of the same element. d. the bond is part of a tetrahedrally shaped molecule. e. one atom is an anion.