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
what do you call an atom of the same element with diffrent numbers of neutrons
isotope
what is the name of a charged atom
ion
what is the name for group 0
noble gases
what is the name for group 1
alkali metals
what is the name for group 7
halogens
what gas is formed when an alkali metal reacts with water
hydrogen
how does the reactivity of the halogens change as you go UP the group
they become more reactive
how does the reactivity of the alkali metals change as you go DOWN the group
they become more reactive
how many electrons are on the outer shell of group 1 metals
one
how many electrons are on the outer shell of group 7 elements
seven
are the metals on the left or right side of the periodic table
left
are the non-metals on the left or right side of the periodic table
right
