I HATE THIS CLASS KILL ME.

sugoi!

periodicity

organization of the periodic table

atomic radius

size of atom

what rows are periods

horizontal - like an x axis

what rows are groups

vertical - like a y axis

what are groups based on

valence electrons

what happens as you go down a table

each group gives you another shell

why does atomic radius get bigger as you go down and left

down - you add shells / left - atomic radius decreases when going right because we are moving within a shell and each element gains a proton

ionization energy

energy required to remove an electron from the atom . it will always be an electron for the outermost shell

electronegativity

ability of atoms to hold electrons tightly

dmitri mendeleev

father of the periodic table

mendeleev’s periodic table

he put elements in rows by increasing atomic weight and in columns by reactions . it was missing spots for unknown elements

current periodic table

made by henri moseley . they are in rows by increasing atomic number

horizontal rows

periods labeled 1-7

vertical columns

groups labeled 1-18

main categories

non metals, metals, metalloids

metal characteristics

good conductor of heat and electricity, shiny, ductile, malleable, chemical property has a corrosive reaction with water

non-metals

bad conductors, not ductile or malleable, brittle, dull, most are gases

metalloids

characteristics of metals and non metals

groups

elements have similar characteristics . same number of valence electrons and form same kind of ions

hydrogen

belongs to its own family . it is a diatomic and reactive gas and also an alternative fuel source

what group is this

alkali metal

alkali metal characteristics

very reactive and soft

what group is this

alkaline earth metals

alkaline earth metals characteristics

reactive

what group is this

transition metals

transition metals characteristics

less reactive and have multiple ionization states

what group is this

metalloids

what group is this

halogen

halogen characteristics

very reactive,, found combined with other elements in nature

what group is this

noble gases

noble gases characteristics

not reactive at all, has full outer electron shell

what group is this

lanthanide series

what group is this

actinide series

how does size of a metal determine the reactivity of the atom

the bigger the atom, the farther the electrons are from the nucleus, making the attraction weaker