Page 44 - Curriculum Visions Dynamic Book

Key facts about...
Sodium
Reacts violently with water
Forms white crusts in desert lakes
Seventh most common element
Found as common salt and as soda
 Sodium makes up four-fifths of the minerals in sea water.
A silvery-coloured metal, chemical symbol Na
Atomic number 11, atomic weight about 23
Makes up four-fifths of the minerals in sea water
Has no smell
Is needed to help nutrients reach body cells
Makes up over 3% of the Earth’s crust
SHELL DIAGRAMS
The shell diagrams on these pages are representations of an atom of each element. The total number
of electrons are shown in the relevant orbitals, or shells, around the central nucleus.
Electron shell
Electron
Nucleus containing protons and neutrons (called nucleons)