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The Atom
Term | Definition |
---|---|
Atom | The basic particle from which all elements are made ; The smallest particle of an element that has the properties of that element. |
Electron | A tiny ; negatively charged particle that moves around the outside of the nucleus of an atom |
Nucleus | The central core of an atom that can change one element into another element . |
Proton | Small, positively charged protons that are found in the nucleus 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 the atom , with no electrical charge . |
Atomic number | The number of protons in the nucleus of an atom. |
Isotopes | An atom with the same number of protons and a different number of 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 isotopes of an element. |
Periodic table | An arrangement of the elements showing the repeating pattern of their properties. |
Chemical Symbol | A one or two letter representation of an element. |
Periods | A horizontal row of elements in the periodic table. |
Groups | Elements in the same vertical column of the periodic table: also called : Family . |