3. SCIENTIST DIVIDE ALLSCIENTIST DIVIDE ALL
ELEMENTS INTO THREEELEMENTS INTO THREE
SECTIONSSECTIONS

4. METALSMETALS
FOUND ON LEFT SIDE OF THE DARKFOUND ON LEFT SIDE OF THE DARK
STAIRCASE LINE ON THE PERIODIC TABLESTAIRCASE LINE ON THE PERIODIC TABLE
SOLID AT ROOM TEMPERATURESOLID AT ROOM TEMPERATURE

Except mercuryExcept mercury
HAVE A SILVER-GRAY COLORHAVE A SILVER-GRAY COLOR

Except gold and copperExcept gold and copper
GOOD CONDUCTORS OF HEAT ANDGOOD CONDUCTORS OF HEAT AND
ELECTRICITYELECTRICITY
HAVE A METALLIC LUSTERHAVE A METALLIC LUSTER
MALLEABLEMALLEABLE

7. NONMETALSNONMETALS
FOUND ON THE RIGHT SIDE OF THE DARKFOUND ON THE RIGHT SIDE OF THE DARK
STAIRCASE LINE ON THE PERIODIC TABLESTAIRCASE LINE ON THE PERIODIC TABLE
FOUND IN ALL STATES OF MATTERFOUND IN ALL STATES OF MATTER
COME IN MANY COLORSCOME IN MANY COLORS
POOR CONDUCTORS OF HEAT AND ELECTRICITYPOOR CONDUCTORS OF HEAT AND ELECTRICITY
(INSULATORS)(INSULATORS)
NO METALLIC LUSTERNO METALLIC LUSTER
NOT MALLEABLENOT MALLEABLE
SOME HAVE STRONG ODORSSOME HAVE STRONG ODORS

9. METALLOIDSMETALLOIDS
THESE ELEMENTS ARE FOUNDTHESE ELEMENTS ARE FOUND
ALONGALONG THE DARK STAIRCASE LINETHE DARK STAIRCASE LINE
ON THE PERIODIC TABLEON THE PERIODIC TABLE

Except Aluminum (Al)Except Aluminum (Al)
HAVE PROPERITIES OF BOTH METALSHAVE PROPERITIES OF BOTH METALS
AND NONMETALSAND NONMETALS
SOME ARE CALLED SEMI-SOME ARE CALLED SEMI-
CONDUCTORSCONDUCTORS

11. Metals, Metalloids, Nonmetals