Page 1 - 3. Lessson Notes- Ch-3 Chemical properties of Metal & Non metals -PDF

SAI International School

Class-X
Subject_ Chemistry
Topic-Metal & Non metals

Subtopic- Chemical properties of Metal & Non metals
LESSON NOTES

• Chemical properties of Elements depend on the number of valence
electrons present in them.

n Meta
No
Metals ls Inert Gases
tr

e

=0
ons
lec
V
a
len

e

Valence Electrons = 1,2,3 Valence Electrons = 5 to 7

c

Form ions by losing Form ions by gaining Nonreactive Elements
electrons & are electrons & are
Electro +ve Elements Electro -ve Elements

• Chemical Properties of METALS:

1.Reaction with Metal + O2 → Metal Oxide (Basic oxide)
Oxygen Metal Oxide + H2O → Metal hydroxide (Base)
Example -
1. 4Na + O2 → 2Na2O
Na2O + H2O → 2NaOH
2. 2Mg + O2 → 2MgO
MgO + H2O → Mg(OH)2
Exception- Oxides of Zn, Al, Pb are Amphoteric oxides.
(Behave as acidic as well as basic oxides.)
2.Reaction with Metal + H2O → Metal Hydroxide /Metal Oxide + H2
Water K, Na, Ca, + H2O(cold) → Metal Hydroxide + H2
Mg, Al, Zn, Fe + H2O (hot/steam) → Metal Oxide + H2
Cu, Ag, Au + H2O → No reaction

3. Reaction with (dil) Metal + (Dil) Acid → Salt + H2(g)
Acid K to Fe + (Dil) Acid → Salt + H2
Cu, Ag, Au + (Dil) Acid → No reaction
Cu + (conc) Acid → Salt + H2O + nMOxide
4. Reaction with Metal1 + Metal2X(aq) → Metal1X(aq) + Metal2
Salts (displacement reaction)

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