the periodic table - chemistry

what is the periodic table

a table that arranged elements by increasing atomic number with elements that have similar properties placed in columns

what is a group in the periodic table

a column - elements in the same group have similar properties

what is a period in the periodic table

rows in the periodic table - elements in the same period have the same number of electron shells

what are the properties of metals in the periodic table

good conductors of electricity and heat, malleable, ductile, often shiny

what are the properties of non - metals in the periodic table

poor conductors of heat and electricity, brittle, dull in appearance

which group in the periodic table are the noble gases in

group 0

inert and have full outer electron shells

which group in the periodic table contains the alkali metals

group 1

highly reactive especially with water

what happens to the reactivity of alkali metals as you move down group 1

reactivity increases

what is the trend in reactivity of halogens as you move down group 7

reactivity decreases

what is the trend in atomic size as you move down a group in the periodic table

atomic size increases

what is the electronic configuration of sodium

2,8,1

how to elements in the same group in the periodic table react chemically

they react in similar ways due to having the same number of electrons in their outer shell

what is the significance of an elements position in the periodic table

the position of an element determines its electronic configuration and its chemical properties

what is the atomic number of chlorine

17