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Terms
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- nucleus
- center core of an atom, containing protons and ussualy neutrons
- proton
- a small positivly charged particle in the nucleus of the atom
- neutron
- a small particle in the nucleus with no electrical charge
- electron
- a tiny negatively charged particle that moves around the nucleus of an atom
- atomic number
- number of protons in the nucleus of an atom
- isotope
- an atom with the same number of protons and a diffeent number of neutrons from other atoms of the same element
- mass number
- sum of protons and nutrons in te nucleus
- model
- in science, a diagram, a mental picture, a mathamatical statement. or an object that helps explain ideas about the natural world
- atomic mass
- average mass of all the isotopes of the elements
- periodic table
- is a chart of the elements showing te repeating pattern of the properties
- chemical symbol
- a one or two letter reprosentation of an element
- period
- horizontal row of elemements in the periodic table
- group
- elements in the same vertical collum of the periodic table; also called family