BRAINSTORMING:
Identify which element is contained in the objects
shown in the pictures
Gold bars are made of gold (Au)
Some food intergrators contain
Magnesium (Mg) and potassium (K)
Aluminum (Al)
Aluminum foil
Signs are
Calcium (Ca) is
often made
contained in milk
of neon (Ne)
Note: in nature, most of the
substances are rather found as
Pure oxygen (O) is stored
chemical compounds and
in the oxygen tank
mixtures; only few substances
13
are elements!