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Science-compounds
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Question | Answer |
---|---|
What is an element | A substance made up of only one type of atom |
How many types of elements are there? | Over 100 types |
What is the most common element in air? | Nitrogen |
Where all the known elements are named? | The periodic table |
All elements are given what to identify them? | symbols |
What is a molecule? | Consists of two or more atoms chemically combined |
Examples of molecules? | H2O.....O2.....C02 |
What is a compound? | Consists of two or more atoms chemically combined |
example of a compound? | Water-is made up with 2 elements, hydrogen and oxygen |
What is a mixture? | A mixture is a non definite amount of elements and compounds |
Example of a mixture? | Air is a mixture of gases. |