1periodic table Flashcards
elements are arranged on periodic table in order of
increasing atomic number
period
horizontal rows that show the number of shells of an electron and are numbered from 1-7
group
vertical columns that show how many outer electrons each atom has and are numbered from 1-7 with a group called 0/8
electronic configuration
2;8;8
the number of notations in the electronic configuration will show
the number of shells of electrons the atom has, showing the period
the last notation of the electronic configuration shows the
group
in 2:8:7 electronic configuration what does it tell us about the period and group
its group 7 and period 3
metals and non metals on the periodic table
stairs starting between B and Al
elements in the same group have
similar chemical properties because they have the same number of outer electrons so will react and bond similarly
the group number of an element indicates
the number of electrons in the outer shell
group 0 elements are called
the noble gases
all noble gases are
monatomic, colourless, non flammable gases at room temp
the group 0 elements all have
full outer shells of electrons and the electronic configuration is extremely sturdy
