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Atoms
| Term | Definition |
|---|---|
| atom | the basic particle from which all elements are made from |
| electron | a tiny negatively charged particle that moves around the outside of the nucleus |
| nucleus | the central core of an atom which contains protons and neutrons |
| proton | small positively charged particles that are found in the nucleus of an atom |
| energy level | a region of an atom in which electrons of the same energy level are likely to be found |
| neutron | a small particle in the nucleus of the atom, with no electrical charge |
| atomic number | the number of protons in the nucleus of an atom |
| isotope | an atom with the same amount of protons and i different number of neutrons from the other atoms of the same element |
| mass number | the total number of protons and neutrons in a nucleus |
| chemical symbol | a code for a chemicall element |
| periodic table | a table of the elements arranged in order |
| group | a number of people or things that are located close together |
| atomic mass | the mass of an atom; mass is because of protons and neutrons |
| period | a length or portion of time |
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