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प्रश्न
Select the correct answer from the options given below.
It is a metal in period 2 having electronic configuration 2, 1?
पर्याय
Beryllium
Lithium
Sodium
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उत्तर
Lithium
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संबंधित प्रश्न
An element 'X' belong to 3rd period and group 13 of the Modern Periodic Table.
(a) Determine the valence electrons and the valency of 'X'.
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Choose the most appropriate answer of the following:
Which of the following would weigh the least?
(A) 2-gram atoms of Nitrogen.
(B) 1mole of Silver
(C) 22.4 liters of oxygen gas at 1 atmospheric pressure and 273K
(D) 6.02 x 1023 atoms of carbon.
[Atomic masses: Ag=108, N=14, O=16, C=12]
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Oxygen, Nitrogen, Carbon, Chlorine, Fluorine
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Arrange the following as per instruction given in the bracket.
Cs, Na, Li, K, Rb (decreasing electronegativity)
An element A has 2 electrons in its fourth shell. State:
position in the periodic table
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