The element with negative charge having the electronic configuration 2,8, 8 is
A) O2-
B) O-
C) S2-
D) P-
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If the valence shell electronic configuration is ns^2 np^5, the element will belong to :
Option : b. halogens
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If the valence shell electronic configuration of an element is 3s^2 3p^1, in which block of the periodic table is it placed?
The element having valence shell electronic configuration 3s2 3p1 must be placed in the p - block of the periodic table as its last electron enters in p-subshell (3p).
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A single electron orbits around a stationary nucleus of charge `+Ze`, where Z is a constant and e is the electronic charge. It requires `47.2 eV` to e
Correct Answer - (i) 5, (ii) 16.6 eV, (iii) 36.3 Å
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Write condensed orbital notation of electronic configuration of the following elements : i. Fluorine (Z = 9) ii. Scandium (Z = 21)
No. Element Condensed orbital notation i. Fluorine (Z = 9) [He] 2s22p5 ii. Scandium (Z = 21) [Ar] 4s23d1 iii. Cobalt (Z = 27) [Ar] 4s23d7 iv. Zinc (Z = 30) [Ar] 4s2 3d10
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An element “X forms an ionic compound with another element Y. Then the charge on the ion formed by X is ……………..
Correct option is A) +1
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The ground state electronic configuration for chromium atom (Z = 24) is …………
Correct Option is : (A) [Ar] \(3d^54s^1\) Tge ground state electronic configuration of Cr is \(1s^2 \ 2s^2 \ 2p^6\) \(3s^2 \ 3p^6 \ 4s^1 \ 3d^5\) or [Ar] \(3d^54s^1\)
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The element with negative charge having the electronic configuration 2,8,8 is ……………..
Correct option is B) Co-
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Electric lines of force about a positive point charge and negative point charge are respectively.
(B) radially outward, radially inward
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i. Identify the element that exhibits only negative oxidation state. ii. Identify the element that exhibits only positive oxidation state.
i. F: It is most electronegative. It shows only a negative oxidation state of -1. ii. Cs: Alkali metals have only one electron in their valence shell and hence, exhibits only positive...
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i. Write the observed outer electronic configuration of Eu. ii. What is the reason for this variation in electronic configuration?
i. Observed outer electronic configuration of europium (Eu) is 6s2 4f7 5d0. ii. In the observed electronic configuration of Eu, 4f subshell is half-filled which is a highly stable configuration. Therefore, observed electronic configuration...
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