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Science Vocabulary
Term | Definition |
---|---|
periodic table | a chart that arranges elements having similar properties into the same groups |
electrostatic charge | a property of matter that can be either positive, negative, or neutral |
strong force | the attractive force that holds the nucleus of the atom together |
atomic number | the number of protons in one atom of a particular element |
atomic mass | the number of protons plus the number of neutrons in one atom |
element | substance that is made of only one particular type of atom and cannot be broken down into simpler substances |
electron energy level | a location of electrons surrounding the nucleus in the atom |
period | a horizontal row of the periodic table |
(group) chemical family | a group of elements that have similar properties |
valence electrons | an electron in the outermost energy level of an atom |
metal | an element that is typically shiny and hard and a good conductor of heat and electricity |
nonmetal | an element that is typically dull and a poor conductor of heat and electricity |