Question

Plzz help krdo!! ❤





Atomic number 1-20 ko learn krne Ke liye(mnemonics) bta do plzz..

Answer 1

1.hydrogen,2.helium
3.lithium,4.berylium
5.boron,6.carbon
7.nitrogen,8.oxygen
9.fluorine,10.neon
11.sodium,12.magnesium
13.aluminium,14.silicon
15.phosphorus,16.sulphur
17.chlorine,18.argon
19.potassium,20.calcium.
I HOPE IT WILL HELPS YOU.....

Answer 2

Answer :-

Trick to learn period table :-

1st A group elements

1. Hydrogen (H) = Hai

3. Lithium (Li) = Lal (+2)

11. Sodium (Na) = Nanda (+8)

19. Potassium (K) = kanahiya (+8)

37. Rubidium ( Rb) = Robbery ke (+18)

55. Caesium (Cs) = cause Mai (+18)

87. Francium (Fr) = farar ho Gaye (+32)

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II A group elements

4. Berilium ( Be) = Beta

12. Magnesium (Mg) = Mange (+8)

20. Calcium (Ca) = car (+8)

38. Strontium (Sr) = scooter (+18)

56. Barium (Ba) = Bap (+18)

88. Radium ( Ra) = Roye (+32)

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I hope it's help you....!!!