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PERIODIC TABLE OF ELEMENTS (TRANSITION ELEMENTS (FORMS ION WITH DIFFERENT…
PERIODIC TABLE OF ELEMENTS
PERIODS
EACH HORIZONTAL COLUMN. THE NUMBER OF ATOMIC SHELLS FILLED WITH ELECTRONS.
ACROSS THE PERIOD. (FROM THE LEFT TO RIGHT)
PROTON NUMBER INCREASES
ATOMIC RADIUS INCREASES
ELECTRONEGATIVITY INCREASES
MELTING POINT AND BOILING POINT INCREASES AND THEN DECREASES
ELEMENT OXIDE TURNS FROM BASIC TO AMPHOTERIC AND THEN TO ACIDIC
GROUPS
EACH VERTICAL COLUMN.GROUP IS EQUIVALENT TO THE NUMBER OF VALANCE ELECTRON
GROUP12
HALOGENS
GROUP18
NOBLE GAS
GROUP2
ALKALI EARTH METALS
GROUP3 TO 12
TRANSITION ELEMENTS
GROUP1
ALKALI METALS
GROUP 18
IT IS A MONOATOMIC GAS AT ROOM CONDITION. IT HAS THE MAXIMUM AMOUNT OF VALANCE ELECTRON IN ITS ATOMIC SHELLS
DOES NOT FORM COMPOUNDS
GROUP 17
ALL HYDROGEN REACTS WITH H20 AND IRON AND SODIUM HYDROXIDE SOLUTION
ALL HALOGENS ARE DIATOM MOLECULES.
METAL OXIDES
ARE
BASIC
NON-METAL OXIDES
ARE
ACIDIC
TRANSITION ELEMENTS
FORMS ION WITH DIFFERENT OXIDATION
FORM COLOURED IONS OR COMPOUNDS
FORM COMPLEX IONS
ACTS AS CATALYST IN CERTAIN REACTIONS