How is the hydrosphere changing? Human contributions to greenhouse gases in the atmosphere are warming the earth's surface - a process which is projected to increase evaporation of surface water and accelerate the hydrologic cycle. In turn, a warmer atmosphere can hold more water vapor.
Noble gases.
group 18. elements that are all unreactive .
fixed naming!
12 protons
13 neutrons
12 electrons
An isotope is an atom with a different number of neutrons but same number of protons
