Metals and Non metals

Physical and Chemical properties of metals and non metals.

1. Matter Elements Compounds Mixtures Gold Sodium chloride Salt solution Example :

2. CLASSIFICATION OF ELEMENTS

3. METALS IN OUR DAILY LIFE

4. NON METALS IN OUR DAILY LIFE

5. METALS : NON METALS

6. Sonority: The ability of metals to produce a particular ringing sound when it is tapped on a hard surface is termed sonority. Non metals do not have the capacity to produce ringing sound.

7. METALS NON METALS Metals have high melting and boiling points Non metals have low melting and boiling points. Metals have high density Non metals have low density. Very hard(except sodium and potassium) Soft(except diamond)

8. Chemical properties : Metals Non metals Corrode easily Do not corrode easily. Metal oxides are generally basic in nature. Non metal oxides are generally basic in nature. They usually dissolve in mineral acids to form salt and liberate some gas. They generally do not react in mineral acids.

9. Reaction with water: Metals react with water to form metal hydroxides and hydrogen. Sodium reacts with water and forms sodium hydroxide and hydrogen gas. 2 Na + 2H 2 O 2NaOH + H 2 Magnesium reacts with water and forms magnesium hydroxide and hydrogen. Mg + H 2 O Mg(OH) 2 +H 2 Non metals do not react with water.

10. Reaction with acids: Metals react with acids to form metallic salts and hydrogen. Zinc reacts with dilute hydrochloric acid to form zinc chloride and hydrogen. Zn + 2HCl ZnCl 2 + H 2 Most of the non metals do not react with acids. But some non metals like sulphur reacts with concentrated nitric acid to form sulphur dioxide, nitrogen dioxide and water. S + 4HNO 3 SO 2 + 4NO 2 + 2H 2 O

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