the periodic table Flashcards
what is in group 0 of the periodic table
non metals called the noble gases
why do elements near eachother in the periodic table have similar chemical properties
cause their atoms have the same number of electrons in the highest occupied energy lever
same number of electrons in outer shell
what is a vertical column of elements in the table called
a group
each group has same number of electrons in the outer shell, which gives them similar chemical properties
what does group 7 contain
very reactive non metals
halogens
what is in the centre of the periodic table
transition metals
why are group one called the alkali metals
they form alkaline compounds
what is the highest occupied energy level mean
outermost shell
what happens when a group 1 reacts with water
creates metal hydroxide and hydrogen
examples of elements in for up one
potassium, sodium, lithium
what happens when group one reacts with oxygen
creates metal oxide
why are group 0 called noble gases
they are very unreactive
they are stable
what are group 1 elements in the periodic table
alkali metals (reactive metals)
what are the rows in the periodic table called
a period
what do the same elements in a period have the same number of
occupied energy levels or shells
what are groups 1s stored under and why
oil
to prevent it from reacting with air and water
