Describe a Cold front explain what weather is found a cold front

from the internet

Explanation:

Weather Fronts. A cold weather front is defined as the changeover region where a cold air mass is replacing a warmer air mass. Cold weather fronts usually move from northwest to southeast. The air behind a cold front is colder and drier than the air in front.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).