What is the difference between elements and compounds?

If you change the number of neutrons an atom has, you make an isotope of that element. All known elements are arranged on a chart called the Periodic Table of Elements. A compound is a substance made from two or more different elements that have been chemically joined.

warm front forms when a moist, warm air mass slides up and over a cold air mass. as the warm air mass rises, it condenses into a broad area of clouds. a warm front brings gentle rain or light snow, followed by warmer, milder weather.

hope i !

it is stable as it is in group 0 which have full outer shells of electrons