periodic table unit Flashcards
(22 cards)
how is the periodic table arranged?
according to atomic number
where are metals located on the PT?
left of the stairs except for H
where can the most active metal be located?
lower left corner (Fr)
what do metals tend to do?
lose electrons and form positive ions
what are good conductors of heat and electricity?
metals
ductile
can be shaped into tiny wires
malleable
can be hammered into thin sheets
what are metals at STP?
all solids except for Hg
metals have ___ ionization energy
low
metals have ___ electronegativity values
low
where can non-metals be located?
to the right of the stairs plus H
where can the most active non-metal be found?
the top right (flourine)
what do non-metals tend to do?
gain electrons and form negative ions
what are poor conductors of heat and electricity?
non-metals
non-metals have ___ ionization energy
high
non-metals have ___ electronegetivity values
high
what group are noble gases in?
group 18
how many valence electrons do noble gases have?
8 valence electrons
metalloids
elements that have properties of both metals and non-metals
where are metalloids located?
along the stairs except for Al and Po
radioactive isotopes
all elements with atomic numbers greater than 82
atomic radius
the size of an atom
