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Gaurav Seth 6 years, 2 months ago
1. Valency is the maximum no. of electrons which an atom can lose or gain while oxidation no. is the actual no. of electrons which the element lose or gain to form a molecule.
2. Valency is the property of an isolated atom while oxidation state is calculated for an atom is present in a molecule i.e, in a bonded state.
3. Valency of an element remains the same while its oxidation state may be different in different molecules.
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Gaurav Seth 6 years, 2 months ago
Mr. Braun, the history teacher was an orthodox and ordinary teacher. He expected his students to be passive listeners only. When Einstein expressed his thoughts and ideology while answering a question, Mr. Braun was annoyed at him. Instead of appreciating his uniqueness and curiosity to know the causes behind the Prussian war, he made fun of his sensible and scientific ideas.
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Yogita Ingle 6 years, 2 months ago
The molecular mass of a substance is the number of times the molecule of the substance is heavier than one-twelth the mass of an atom of carbon -12. Or, the molecular mass is equal to the sum of its atomic masses of all the atoms present in one molecule of a substance. For eg: Water (H2O)
Atomic mass of H= 1 unit
Atomic mass of O =16 units
The molecular mass of water = 2 × atomic mass of H+1 × atomic mass of O
= 2 × 1 + 16 × 1
= 18 units
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Jio Vs Airtal 6 years, 2 months ago
1Thank You