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Structure of the Atom

Define valency by taking examples of silicon and oxygen.

Science

Class 9

NCERT

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Chapter 4: Structure of the Atom

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Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

Define valency by taking examples of silicon and oxygen.

Explain with examples (i) Atomic number, (ii) Mass number, (iii) Isotopes and (iv) Isobars. Give any two uses of isotopes.

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Solving time: 3 mins

Define valency by taking examples of silicon and oxygen.

Name: Video solution 1: [Solved] Define valency by taking examples of silicon and oxygen. - Science
Uploaded: 2022-10-03T16:10:15.000Z
Duration: 2 min
Description: Video solution 1: [Solved] Define valency by taking examples of silicon and oxygen. - Science

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Updated on: Jun 29, 2023

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Science (NCERT)

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Text solutionVerified

Definition: Valency is defined as the combining capacity of the element. It is determined by the number of valence shell electrons present in the atom.

If the number of valence electrons is less than or equal to 4 so the valency is the same as the number of electrons present.

If the number of valence electrons is more than 4 then the valency is 8-(the number of valence shell electrons).

Example:

(1)Silicon has atomic number 14. The electronic configuration of silicon is 2, 8, 4. The number of valence electrons is 4. So the valency is 4.

(2)Oxygen has an atomic number 8. The electronic configuration is 2, 6. The valency is (8-6)=2.

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Summarise the rules for writing of distribution of electrons in various shells for the first eighteen elements.

Define valency by taking examples of silicon and oxygen.

Explain with examples (i) Atomic number, (ii) Mass number, (iii) Isotopes and (iv) Isobars. Give any two uses of isotopes.

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Question Text	Define valency by taking examples of silicon and oxygen.
Updated On	Jun 29, 2023
Topic	Structure of the Atom
Subject	Science
Class	Class 9
Answer Type	Text solution:1 Video solution: 7
Upvotes	765
Avg. Video Duration	3 min

Define valency by taking examples of silicon and oxygen.

Text solutionVerified

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