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Question 8:
(a) What are valence electrons? Where are valence electrons situated in an atom?
(b) What is the number of valence electrons in the atoms of an element having atomic number 13? Name the valence shell of this atom.
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Answer:
(a) Valence electrons are electrons present in the outermost orbital of the atom, basically, only valence electrons participate in bond formation.
Valence electrons are present on outermost orbit.
(b) Electronic configuration of the element with atomic number 13 is 2, 8, 3. So, the number of valence electrons present in the given element is 3. The electronic configuration of the given element is as follows:
So, the valence shell will be M.
Valence electrons are present on outermost orbit.
(b) Electronic configuration of the element with atomic number 13 is 2, 8, 3. So, the number of valence electrons present in the given element is 3. The electronic configuration of the given element is as follows:
So, the valence shell will be M.
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| Question Text | Question 8:
(a) What are valence electrons? Where are valence electrons situated in an atom? (b) What is the number of valence electrons in the atoms of an element having atomic number 13? Name the valence shell of this atom. |
| Updated On | Sep 14, 2022 |
| Topic | Atoms and Molecules |
| Subject | Science |
| Class | Class 9 |
| Answer Type | Text solution:1 Video solution: 1 |
| Upvotes | 229 |
| Avg. Video Duration | 14 min |
