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The Atom
Term | Definition |
---|---|
Atom | The smallest particle from which all elements are made |
Electron | A tiny, negatively charged particle that moves around the outside of the nucleus of an atom |
Nucleus | The central core of an atom which contains protons and neutrons |
Proton | Small, positively charged particles that are found in the center of an atom |
Energy Level | A region of an atom in which electrons of the same energy are likely to be found |
Neutron | A small particle in the nucleus of an atom with no electric charge |
Atomic Number | The number of protons in the nucleus of an atom |
Isotope | Atoms with the same number of protons and different neutrons from other atoms of the same element |
Mass Number | The sum of protons and neutrons in the nucleus of an atom |
Atomic Mass | The average mass of all the isotopes in an element |
Periodic Table | An arrangement of the elements showing the repeating pattern of their properties |
Chemical Symbol | One or two letter representation of an element |
Period | A horizontal row of elements in the periodic table. |
Group | Elements in the same vertical column of the periodic table |