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Science Ch. 10 L. 2
Question | Answer |
---|---|
What is a molecule? | A particle that contains more than one atom joined together. |
which parttical has no electric charge? | neutron |
what is an atom? | The smallest unit of an element that retains the properties of the element |
what particle in the atom is not located within the nucleus? | electron |
What is a substance that is created by the chemical comination of two or more elements? | compound |
What famous scientist discovered that the properties of elements went through repeating cycles? | Dmitri Mendeleyev |
How many Hydrogen atoms are in H2O? | 2 |
What particle has a positive charge? | proton |
What particle has a negative charge? | electron |
What is the biggest group of elements on the periodic table? Metals, non metals, or metalloids? | metals |
What is the chemical symbol for carbon dioxide? | CO2 |