chemistry- atomic structure & periodic table Flashcards
what are all substances made up of
atoms
what do the following symbols stand for: (s), (l), (g)
solid, liquid and gas
what is the name for when two or more substances that ARE NOT chemically combined
mixture
what is the name of two or more substances that ARE chemically combined
compound
what is the name for a material that is made up of only one type of atom
element
what process is used to seperate liquids with diffrent boiling points
fractional distillation
what process is used to seperate a liquid and an insoluble solid
filtering
what process is used to detect the diffrent dyes in food colorings
chromatography
who came up with the idea of the ‘plum pudding’ model
JJ thompson
which scientist proved that there was a dense positive nucelus
ernest rutherford
what is the name of the negative subatomic particle
electron
what is the name of the positive subatomic particle
proton
what is the name for the neutral subatomic particle
neutron
what does the atomic number of an atom show
the number of protons
what is the atomic mass number the sum of
the number of protons and neutrons
