Answer:
Evaporation is when the sun's sun rays hit on water and water vapor forms
There are 3 atoms in CO2 (Carbon dioxide).
Carbon has 1 atom and oxygen has 2 atoms.
To get the number of gold atoms, you have to divide the mass of the gold by the mass of the gold atom. It follows this simple equation

.
Let x be the number of gold atoms. Plug in the values to a calculator.
x =

Both have the same units so the unit gram(g) can be cancelled.
x then would be equal to 1.53x10^22. So there are 1.53x10^22 atoms of gold in 5 g of gold
Radon is <span>not a source of air pollution related to human activities</span>