hope so like it!!!

1. PRESENTATION
BY
DISCIPLINE GROUP

2. PERIODIC TABLE

3.  A TABLE SHOWING THE SYSTEMATIC
ARRANGEMENT OF ELEMENTS IS CALLED
PERIODIC TABLE.
 IT IS BASED ON PERIODIC LAW WHICH STATE
THAT IF ELEMENTS ARE ARRANGED IN THE
ORDER OF THEIR INCREASING ATOMIC
NUMBERS, THEIR PROPERTIES ARE REPEATED IN
A PERIODIC TABLE.
 IT IS ONE OF THE IMPORTANT TOOL IN
CHEMISTRY.

4. PERIODS OF PERIODIC TABLE THE
HORIZONTAL
ROWS OF THE
PERIODIC TABLE
IS CALLED
PERIODS.
 THERE ARE
VARYING
NUMBER OF
ELEMENTS IN
PERIODIC TABLE.

5.  THERE ARE SEVEN PERIODS.
 FIRST THREE PERIODS ARE CALLED SHORT
PERIODS.
 THE REMAINING PERIODS ARE CALLED LONG
PERIODS.
 THE PROPERTIES OF THE ELEMENTS WITHIN A
PERIOD CHANGE GRADUALLY AS YOU MOVE LEFT
TO RIGHT BUT WHEN YOU MOVE FROM ONE
PERIOD TO NEXT, THE PATTERN OF PRORERTIES
WITHIN A PERIOD.

6. GROUPS OF PERIODIC TABLE
 EACH VERTICAL
COLUMN OF
ELEMENTS IN THE
PERIODIC TABLE IS
CALLED A GROUP OR
FAMILY.
 THERE ARE VARYING
NUMBER OF
ELEMENTS IN A
GROUP.

7.  THERE ARE EIGHT GROUPS.
 EACH GROUP IS IDENTIFIED BY A NUMBER AND
THE LETTER.
 GROUP A ELEMENTS ARE CALLED
REPRESENTATIVE ELEMENTS.GROUP B ELEMENTS
ARE CALLED TRANSITION ELEMENTS.
 GROUP 1 A ELEMENTS ARE CALLED ALKALI
ELEMENTS,GROUP 2 A ARE CALLED ALKALINE
ELEMENTS,GROUP 7 A ARE CALLED HALOGENS
AND GROUP 8 A ELEMENTS ARE CALLED NOBAL
GASES.

8. ON THE BASIS OF
VALENCE SUB
SHELL, ELEMENTS
IN THE PERIODIC
TABLE CAN ALSO
BE CLASSIFIED
INTO FOUR
BLOCKS.
ELEMENTS OF
GROUP 1 A AND 2 A
CONTAIN THEIR
VALENCE
ELECTRONS IN S
SUB SHELL.
GROUP 3 A TO
GROUP 8 A (EXCEPT
HYDROGEN) ARE
KNOWN AS P
BLOCK