the periodic table Flashcards
how did Mendeleev arrange the periodic table
he arranged it in order of increasing the mass number
what did he think to do on the periodic table
he thought to leave gaps
give 4 points on Mendeleev`s table
elements arranged in order of atomic mass
no noble gases present
gaps were left for undiscovered elements
no block for transition metals
give 4 points on the modern periodic table
elements arranged in order of atomic number
noble gases present
no gaps
block of transition metals
whats a element
a substance made up of 1 type of atom
whats the properities of metals
high MP
malleable
ductile
good conductor
whats the properities of non metals
low MP
poor conductors
(except for graphite and graphene)
what group are the alkali metals in
group 1
what group of the halogens in
group 7
what group are the noble gases in
group 0
name two groups of metals in the periodic table
alkali metals
alkali earth metals
what are the gaseous elements
hydrogen– nitrogen– oxygen– fluorine– chlorine– all the noble gases (helium, neon, argon, krypton, xenon and radon
The liquid elements are?
bromine (a non-metal) and mercury (a metal).
