It can be a compound or a single element. An element is a pure substance that cannot be separated into simpler substances by chemical or physical means. There are about 117 elements, but carbon, hydrogen, nitrogen and oxygen are only a few that make up the largest portion of Earth.
I would say pure substances
Answer:
There's only one electron in hydrogen.
A lot of people take a low dose of aspirin every day to lower their risk of a further heart attack or stroke.
A. The kinetic energy of gas particles is higher in hot food than in cold food.
Explanation:
The smell of a hot food moves faster than the smell of a cold food because the kinetic energy of gas particles is higher in hot food than in cold food.
Let us establish that the smell of the food perceived are gases from the food.
- Both hot food and cold food emits these gases that tinkers our olfactory nerves.
- Hot food produces a hot gas.
- The higher the temperature the more kinetic energy it possess.
- This makes the gases more dispersed and it spreads faster.
- The cold food produces gas at a lower kinetic energy.
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Molecular theory brainly.com/question/12362857
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