metals and non-metals Flashcards
group 1 elements are also called..
alkali metals
group 7 elements are also called…
halogens
group 0 elements are also called…
noble gases
define ‘metalloids’
elements that have properties of metals and non-metals
where are metals found and why?
metals are found on the left because they don’t have many electrons in the outer shells
what ions do metals form and why?
metals form positive ions because they must lose electrons to gain a full outer shell
define ‘density’
how heavy it feels for its size
define ‘malleable’
bend without breaking
define ‘ductile’
can be stretched into thin wires
define ‘brittle’
break or shatter when bent
properties of metals
lustrous (shiny)
malleable
good conductor of heat and electricity
high density
solid (except mercury)
sonorous
ductile
magnetic (only iron, cobalt and nickel)
properties of non-metals
poor conductor of heat and electricity (except carbon)
weak
brittle
low density
dull sound
dull appearance
can be solid, liquid or gas