1. What are atoms?

2. What are elements?

3. What is the significance of elements?

Elements exist in solid state Gold Au

Silver Ag

Elements exist in liquid state

Mercury Hg

Elements exist in gases state

Helium He

goldsilver

helium

oxygen

mercury

hydrogen

sodium

nitrogen

niobium

neodymium

chlorine

carbon

1. Months of the year

2. Time on the clock

3. Days in a weak

Each of the above have periodic trend

Like substances can be grouped in to category

based on their properties, likewise elements can also be

grouped in to categories depending on similar

characteristics.

Fruits Vegetables

Sweats

Fruits Sweets

Vegetable

Father of the periodic table – Dimitri mendeleev

He grouped 63 elements in a table form

Modern periodic table is based on mendeleeve’s idea

1 2 3 4 5 6 7 8 9 10

11

12

13

14

15

16

17

18

2

3

4

5

6

7

PERIODIC TABLE

Atomic number

Symbol

Name in English

Name in latin

11

Na

Sodium

Natrium

Metallids

Silicon

Non-Metals

Sulfur

EXPANSION

ABBREVATIONS

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Bharat Sanchar Nigam ltd. BSNL

Life Insurance Cooperation LIC

National Cadet Corps NCC

National Service Scheme NSS

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Key to the Periodic Table

SymbolsAll elements have

their own unique symbol.

It can consist of a single capital letter, or a capital letter and one or two lower case letters.

C Carbon

CuCopper

Common Elements and Symbols

symbol ON THE BASIS OF latin NAME

ENGLISH NAME LATIN NAME SYMBOL

Sodium Natrium Na

Pottassium Kalium K

Gold Aurum Au

Iron Ferrum Fe

Copper Cuprum Cu

Mercury Hydragyrum Hg

symbols ON THE BASIS OF english NAMENAME SYMBOL

Hydrogen H

Helium He

Aluminium Al

Carbon C

Calcium Ca

Oxygen O

Nitrogen N

Chlorine Cl

On the basis of

1.countries name

2.Scientist name

3.Planets

A symbol indicates an atom of an element

‘H’ It is the symbol of hydrogen &

Indicate an atom of Hydrogen

‘C’ It is the symbol of Carbon &

Indicate an atom of Carbon

The symbols we use now in the sudy of

chemistry were developed by the scientist,

Berselius.

What does each of these indicate?

1.12 H

2.3 C

3.12 N