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K science 11/22/11
atoms and stuff
Question | Answer |
---|---|
atomic number | number of protons in the nucleus of an atom |
atomic mass | total mass of the protons and nuetrons in an atom measured byatomic mass units (amu) |
mass number | number of protons and nuetrons in the nucleus of ans atom |
energy level | place in an electron cloud where an electron is most likely to be found |
chemical symbol | shortened way of writing the name of an element |
periodic | repeating pattern |
group | vertical column of elements in the periodic table |
period | horizontal row of elements in the periodic table |
Metal | Element that has the property of shiny luster, ductility, and malleability |
Luster | The way a material reflects light |
Ductile | Able to be drawn into thin wire |
Nonmetal | Element that lacks most properties of metal |
malleable | able to be hammered into different shapes |