atoms elements and the periodic table Flashcards
what are atoms
very small particles that can’t be seen directly
what three things did dalton conclude about atoms
all mater is made up of atoms
there are different types of atoms
each element contains a different type of atom
what is an element
a substance that contains only one type of atom
what properties does copper have
copper is a soft bendy metal
what property does oxygen have
oxygen is a colourless gas
what is the periodic table
it shows all the elements that have been discovered
what are elements represented by
one or two letter symbols
elements with similar properties are arranged into what
vertical columns called groupsw
what are horizontal rows called
periods
what happens in the group 1 ( first column)
the metals get more reactive down the group least reactive to most reactive
what happens to lithium which is at the top of group 1 when added to water
lithium (Li)
what happens to rubidium when added to water
rubidium (Rb) explodes when added to water
what happens to the group 7 as you go down the column
the group7 non-metal get less reactive down the group
what are the group 0 elements like
group 0 elements are very unreactive
what can you use the periodic table to predict
predict patterns in reactions
what group is hydrogen sometimes put in
group 1
