The number of electrons in the valence shell of semiconductor is ……………
(A) less than 4
(B) equal to 4
(C) more than 4
(D) zero
1 Answers
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If number of electrons in M-shell is half of K-shell then atomic number and name of element.
B) 11, Sodium
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l = 0 — i) d – sub shell , 1 = 1 — ii) s – sub shell , 7 = 2 — iii) f – sub shell
C) a → ii, b → iv, c → i, d → iii
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a) s – sub shell i) Maximum number of electrons is 6, b) p – sub shell ii) Maximum number of electrons is 14
C) a→iii, b→i, c→iv, d→ii
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The maximum number of electrons accommodated in a sub shell with Azimuthal quantum number (angular momentum quantum number) l is ………………….
Correct option is B) 4l + 2
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valence of group IA — i) 4 , valence of group IVA — ii) 0
D) a → iii, b → i, c → iv, d → ii
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AH2 is formed when element A reacts with hydrogen. Then the number of electrons in valence shell of A are generally
Correct option is A) 2
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The valence shell of the central atom of a molecule has four bond pairs of electrons. Shape of the molecule is ……………..
D) Tetrahydral
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A molecule having 2 bond pairs and 2 lone pairs in the valence shell of its central atom.
Correct option is A) H2O
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Can we take one slab of p-type semiconductor and physically join it to another n-type semiconductor to get p-n junction?
1. No. Any slab, howsoever flat, will have roughness much larger than the inter-atomic crystal spacing (~2 to 3 Å). 2. Hence, continuous contact at the atomic level will not be possible....
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If the temperature of semiconductor is increased, the number of electrons in the valence band will ……………….
Correct option is: (A) decrease
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