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atomic structure
| Question | Answer |
|---|---|
| What is the charge of protons | positive charge (+1) |
| what is the charge of neutrons | neutral (0) |
| what is the charge of electrons | negative (-1) |
| The middle of an atom contains | protons and neutrons |
| what moves around the shells (levels) | electrons |
| what is the mass number | number of protons and also the number of neutrons(mass number - atomic number) |
| what is the atomic number | number of protons (also number of electrons) |
| A element is | atoms that have the same number of protons in their nucleus |
| A compound is | atoms joined together |
| A mixture is | at least 2 different elements or compounds |