Mercury is an environmental pollutant that is produced by the burning of fossil fuels and can be toxic to wildlife and humans. What does this show about the impact of chemicals on the environment ?

How do scientists think that gravity affected the formation of our solar system?

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride