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17 Cards in this Set
- Front
- Back
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atom
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particles as a source of nuclear energy.
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atomic number
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the number pf protons in a nucleus of an atom.
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Bohr diagram
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models of an atom.
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chemical symbol
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1 or 2 letters representing the element on the periodic table.
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electron
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negative charge of electricity.
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energy level
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amount of energy in an element.
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family
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vertical rows in a periodic table.
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isotope
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two or more forms in an element.
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mass number
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the total number of protons and neutrons in a nucleus.
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metalloid
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an element whose properties are intermediate between metals and non metals.
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metal
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solid good conductors of electricity and heat usually hard and shiny.
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neutron
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a particle with about the same mass as a proton.
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non-metal
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an element or substance that is not a metal.
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nucleus
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the central and most important part of an object.
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period
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horizontal rows in a periodic table.
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periodic table
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chemical elements arranged by atomic number.
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proton
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a stable subatomic particle occurring in all atomic nuclei.
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