Atomic Number
Revision as of 11:34, 30 September 2018 by NRJC (talk | contribs) (Created page with "==Key Stage 3== ===Meaning=== right|400px|thumb|An [[element tile showing the Atomic Number.]] The Atomic Number is the number of protons...")
Key Stage 3
Meaning
The Atomic Number is the number of protons in the nucleus of an atom.
About The Atomic Number
- The Atomic Number of an atom determines which element it is.
- The number of protons also determines the number of electrons.
Examples
| Hydrogen | Helium | Lithium | Beryllium |
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| Hydrogen has 1 proton so its atomic number is 1. | Helium has 2 protons so its atomic number is 2. | Lithium has 3 protons so its atomic number is 3. | Beryllium has 4 protons so its atomic number is 4. |