There are 72 different kinds of known elements in the universe true or false

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Geothermal energy for industrial use is available almost anywhere. a.true b.false

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive