* Refer the no(prenominal)es given to you in class as well as your NCERT textbook
* Laws of chemical combinations- explanation with example-section 3.1
* law of saving of mass-sec 3.1.1
* law of definite proportions-sec 3.1.2
* Atomic symbols- set back 3.1(pg. no. 34) and bow 4.1 (pg. no. 51)
* amu-definition-sec 3.2.2 (pg. no. 35), put off 3.2 (pg. no. 35)
* Difference among molecule of an element and molecule of a compound with examples-sec3.3, Atomicity -Table 3.3(pg. no. 36)
* Determination of atomic ratio from mass ratio Table 3.4(pg. no. 36)
* Water(mass ratio of hydrogen & oxygen is 1:8)
* Ammonia (mass ratio of nitrogen &hydrogen is 14:3)
* Carbon dioxide (mass ratio of cytosine & oxygen is 3:8)
* Carbon monoxide (mass ratio of carbon & oxygen is 3:4)
* Methane (mass ratio of carbon & hydrogen 3:1)
* rendering of ion, cation, anion, polyatomic anion, polyatomic cation with examples-section3.3.3(Table 3.6, pg, no. 37)
* Valency of elements- (Table 3.6, pg, no. 37), Table 4.1 (pg. no.
51)
* Chemical formulae- Hydrochloric acid (HCl), nitric acid(HNO3), sulphuric acid(H2SO4), phosphoric acid(H3PO4), ammonia(NH3), carbon dioxide(CO2), carbon monoxide(CO), methane(CH4), limewater(calcium hydroxide)-Ca(OH)2, limestone or marble (calcium carbonate)-CaCO3, Quicklime ( calcium oxide)-CaO, atomic number 11 nitrateNaNO3, Caustic soda( sodium hydroxide)-NaOH, Caustic potash (potassium hydroxide)-KOH, baking soda( sodium hydrogen carbonate)-NaHCO3, potassium nitrate-(KNO3), Ammonia-(NH3), Ammonium chloride(NH4Cl), Ammonium sulphate(NH4)2SO4, Ammonium carbonate(NH4)2CO3, atomic number 13 nitride(AlN), Aluminium sulphate-Al2(SO4)3, Aluminium oxide-Al2O3, Sodium sulphate-Na2SO4, Sodium oxide-Na2O, Sodium carbonate-Na2CO3, carbonaceous acid(H2CO3)
* Steps to derive chemical formulae-All examples given in NCERT
* pen the symbols of the elements
* Write valency below their...If you want to get a full essay, order it on our website: Orderessay
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