Argon and calcium both have an atomic mass that rounds to 40, but they have different atomic numbers. what are the differences between the two atoms, based on the information given?

shield volcanos are angry and get mad over the smallest things so much that there heads erupt   pahoehoe and a'a lava. a composite volcano is the poller opposite of a shield volcano. its   peaceful thing and knows how to control its emotions.      

i belive it is water