NIRUPAMA ROYAssistant Teacher

South Point School & College

U S E O F D I G I T A L C O N T E N T S I N S T U D E N T S ’ T E A C H I N G

Class-IX

Chemistry

Chapter - Seven

Periodic Table

Learning Objectives

SS will be able to define the Periodic Table

They will be able to state the characteristics of the periodic table

They will be able to locate the position of any element in the table

Difficult to find information Easy to find information

Click Here for Video Link to warm up session

Periodic Table

Dimitri Ivanovich Mendeleev

Father of the Periodic Table

Horizontal Row

Vertical Column

Horizontal Row = Period

Vertical Column = Group

Fertilizer Edible Salt

Na = SodiumK = Potassium

KCl NaCl

K Na

Cl

Na

Electron Configurations of Sodium and Potassium

Similar Chemical Properties

K

NaRb

Cs

Solid

Similar Physical Properties

Elements in the same group have similar chemical and physical properties!!

Neon Lights

Xe

Kr

He

Rn

Inert Gas

SymbolHeNe

Ar

Kr

Xe

Rn

Atomic Number

2

10

18

36

54

86

K L M N O P Q22 8

2 8 8

2 8 18 82 8 18 18 82 8 18 32 18 8

They all have stable electron configurations

Elements in the same group have similar chemical and physical properties!!

B C N

O

Period 2

Gp I

SymbolBeMg

Ca

Sr

Ba

Ra

Atomic Number

4

12

20

38

56

88

K L M N O P Q2 22 8 2

2 8 8 2

2 8 18 8 22 8 18 18 8 22 8 18 32 18 8 2

Ca 1stOrbit 2ndOrbit 3rd Orbit 4th Orbit

2 8 8 2

In which Group and Period we can put Ca

Select an element

Name: Hydrogen Symbol: H Atomic Number: 1 Atomic Mass: 1.00794 amu Melting Point: -259.14 °C (14.009985 °K, -434.45203 °F) Boiling Point: -252.87 °C (20.280005 °K, -423.166 °F)

The Space Shuttle Main Engine burns hydrogen with oxygen, producing a nearly invisible flame at full thrust.

Name: Helium Symbol: He Atomic Number: 2 Atomic Mass: 4.002602 amu Melting Point: -272.0 °C (1.15 °K, -457.6 °F) Boiling Point: -268.6 °C (4.549994 °K, -451.48 °F)

He

Name: Lithium Symbol: Li Atomic Number: 3 Atomic Mass: 6.941 amu Melting Point: 180.54 °C (453.69 °K, 356.972 °F) Boiling Point: 1347.0 °C (1620.15 °K, 2456.6 °F)

Name: Beryllium Symbol: Be Atomic Number: 4 Atomic Mass: 9.012182 amu Melting Point: 1278.0 °C (1551.15 °K, 2332.4 °F) Boiling Point: 2970.0 °C (3243.15 °K, 5378.0 °F)

Name: Boron Symbol: B Atomic Number: 5 Atomic Mass: 10.811 amu Melting Point: 2300.0 °C (2573.15 °K, 4172.0 °F) Boiling Point: 2550.0 °C (2823.15 °K, 4622.0 °F)

Boron chunks

Name: Carbon Symbol: C Atomic Number: 6 Atomic Mass: 12.0107 amu Melting Point: 3500.0 °C (3773.15 °K, 6332.0 °F) Boiling Point: 4827.0 °C (5100.15 °K, 8720.6 °F)

Name: Nitrogen Symbol: N Atomic Number: 7 Atomic Mass: 14.00674 amu Melting Point: -209.9 °C (63.250008 °K, -345.81998 °F) Boiling Point: -195.8 °C (77.35 °K, -320.44 °F)

Liquid Nitrogen

Name: Oxygen Symbol: O Atomic Number: 8 Atomic Mass: 15.9994 amu Melting Point: -218.4 °C (54.750008 °K, -361.12 °F) Boiling Point: -183.0 °C (90.15 °K, -297.4 °F)

Water (H2O) is the most familiar oxygen compound

Name: Fluorine Symbol: F Atomic Number: 9 Atomic Mass: 18.998404 amu Melting Point: -219.62 °C (53.530006 °K, -363.31598 °F) Boiling Point: -188.14 °C (85.01 °K, -306.652 °F)

Liquid fluorine at cryogenic temperatures

Name: Neon Symbol: Ne Atomic Number: 10 Atomic Mass: 20.1797 amu Melting Point: -248.6 °C (24.549994 °K, -415.48 °F) Boiling Point: -246.1 °C (27.049994 °K, -410.98 °F)

Name: Sodium Symbol: Na Atomic Number: 11 Atomic Mass: 22.98977 amu Melting Point: 97.8 °C (370.95 °K, 208.04001 °F) Boiling Point: 552.9 °C (826.05005 °K, 1027.2201 °F)

Na

Name: Magnesium Symbol: Mg Atomic Number: 12 Atomic Mass: 24.305 amu Melting Point: 650.0 °C (923.15 °K, 1202.0 °F) Boiling Point: 1107.0 °C (1380.15 °K, 2024.6 °F)

Name: Aluminum Symbol: Al Atomic Number: 13 Atomic Mass: 26.981539 amu Melting Point: 660.37 °C (933.52 °K, 1220.666 °F) Boiling Point: 2467.0 °C (2740.15 °K, 4472.6 °F)

Name: Chlorine Symbol: Cl Atomic Number: 17 Atomic Mass: 35.4527 amu Melting Point: -100.98 °C (172.17 °K, -149.764 °F) Boiling Point: -34.6 °C (238.55 °K, -30.279997 °F)

Liquid chlorine analysis

Name: Argon Symbol: Ar Atomic Number: 18 Atomic Mass: 39.948 amu Melting Point: -189.3 °C (83.85 °K, -308.74 °F) Boiling Point: -186.0 °C (87.15 °K, -302.8 °F)

Name: Potassium Symbol: K Atomic Number: 19 Atomic Mass: 39.0983 amu Melting Point: 63.65 °C (336.8 °K, 146.57 °F) Boiling Point: 774.0 °C (1047.15 °K, 1425.2 °F)

K

Name: Calcium Symbol: Ca Atomic Number: 20 Atomic Mass: 40.078 amu Melting Point: 839.0 °C (1112.15 °K, 1542.2 °F) Boiling Point: 1484.0 °C (1757.15 °K, 2703.2 °F)

Name: Rubidium Symbol: Rb Atomic Number: 37 Atomic Mass: 85.4678 amu Melting Point: 38.89 °C (312.04 °K, 102.002 °F) Boiling Point: 688.0 °C (961.15 °K, 1270.4 °F)

Rb

Group A Group B Group C Group D

Group Work

Determine the period and group of the following elements

Home Work

Explain electron configuration which is the basis of periodic table

Click Here for Video Link

Acknowledgement

www.youtube.comhttp://www.youtube.com/watch?v=d0zION8xjbMwww.google.comwww.wikipedia.comwww.infokosh.gov.bd

THANKS TO ALL