How many different kinds of atom are there in elements and compounds

A molecule is a substance that contains two or more atoms chemically joined, such as H2,O2

A compound is a substance that is made up of two or more different elements that are chemically joined, such as  H20,Co,NaCi

Explanation:

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation:

samuel de champlain. in 1608, king henry iv sponsored pierre dugua, sieur de mons and samuel de champlain as founders of the city of quebec with 28 men. this was the second permanent french settlement in the colony of canada.