What is an example of atom, element and compound and why?

An element is a substance that is made entirely of one type of atom. For example, the element sodium is made up of only sodium atoms. A compound is a substance that is made up of two or more different elements that are chemically joined, such as H2O,CO,NaCl .

Explanation:

frequency, z, and the collision density, z, in carbon dioxide (co2), r 180 pm at 30 °c and 120 kpa

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.

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