classification of elements on the periodic table Flashcards
where are metals located on the periodic table?
mostly on the left side
where are nonmetals located on the periodic table?
mostly on the right side
where are metalloids located on the periodic table?
along the stair step line that distinguishes metals from nonmetals
what are the 5 properties of metals?
- solid (except mercury)
- shiny
- good conductor
- malleable
- ductile
what are the 5 properties of nonmetals?
- gas/ liquid/ solid
- not shiny
- poor conductor
- brittle (not malleable)
- not ductile
what are the properties of metalloids?
share properties of both metals and nonmetals
what is a period?
a horizontal row of elements
what is a group?
a vertical column of elements
what is a group also known as?
a chemical family
what is the special name for group 1?
alkali metals
what are alkali metals reactivity levels?
highly reactive
what is the special name for group 2?
alkaline earth metals
what are alkaline earth metals reactivity levels?
reactive
what is the special name for group 17?
halogens
what are halogens reactivity levels?
highly reactive
what is the special name for group 18?
noble gases
what are noble gases reactivity levels?
non reactive
what are the colours of alkali metals?
silver- grey
are alkali metals malleable and ductile?
yes
do alkali metals conduct electricity and heat?
yes
do alkali metals have low or high melting points (compared to other metals)?
low
are alkali metals soft (enough to cut with a knife)?
yes
do alkali metals react with water and air?
yes
what changes gradually in alkali metals from the top elements to the bottom?
physical properties
are halogens all metals or nonmetals?
nonmetals
do halogens have a noticeable colour?
yes
do noble gases have colour?
no
when will noble gases glow brightly?
when an electric current is passed through them
in noble gases, does the density increase or decrease from helium to radon?
increase
