What happens when air masses collide?

When two air masses collide they do not mix, instead they push against each other. If a cold air mass and a warm air mass meet then the warm air rises because it is lighter then cold air.The boundary where two air masses meet is called a front.

Explanation:

Have a fantaboulus dy, well thats all I have to sy!

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6