1. Mixtures, Elements and Compounds
A Matter of Fact
Mixtures, Elements and Compounds

4. HENRY MOSELEY DEVISED THE MORDERN PERIODIC TABLE
ARRANGING ELEMENTS AS PER THEIR ATOMIC NUMBER.

5. What is a Periodic Table?
It is a tabular display of Chemical Elements.
It is classified into : Alkali Metals, Alkaline earth metals, transition metals metalloids, halogens, noble gases, rare earth metals

6. PERIODIC TABLE

7. ELEMENTS CATEGORY IN THE periodic table
Metals
Metalloids
Nonmetals
Unknown chemical properties
Alkali metals
Alkaline earth metals
Inner transition metals
Transition metals
Post-transition metals
Other nonmetals
Halogens
Noble gases
Lanthanides
sActinides

8. What is a Periodic Table?
It is a tabular display of Chemical Elements.
It is classified into : Metals, alkaline earth metals, metalloids, halogens, transition metals, noble gases, rare earth metals

9. Metals Very “reactive metals”, do not occur freely in nature.
Such metals are soft, malleable, ductile, good conductors of heat and electricity.
Malleable - can be beaten into thin sheets.
Ductile - can be stretched into wire.
Possess metallic luster.
Solid at room temperature (except Hg).
Examples : Lithium, sodium, potassium, copper, mercury

10. copper

11. Non Metals Present in Group 14, 15, 16
Exist in room temperature as gases (Oxygen) and solids (Carbon).
Very brittle-if a solid
cannot be rolled into wires (Nonductile).
Cannot be pounded into sheets
Cannot conduct heat and electricity, do not reflect light.
Do not possess metallic luster.
E.g: Hydrogen, Nitrogen, Carbon, Oxygen

13. Noble Gases Present in Group 18 of the periodic table.
Very low reactivity
colorless, odorless, tasteless
This group has lots of uses.
E.g : helium, neon, Argon, Krypton, Xenon, Radon.

14. neon and helium or argon -- used In light bulbs. Laser lights
Xenon headlights are found in BMW cars

15. TASK Download the tasks from the website: Atomic Wksht 1