Question : In which group of the Periodic Table will you put the elements with electronic configuration [He]2s22p6?
Option 1: 8
Option 2: 6
Option 3: 18
Option 4: 10
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Correct Answer: 18
Solution : The correct answer is 18.
Elements with the electronic configuration [He]2s22p6 belong to Group 18, the noble gases that are colourless, odourless, diamagnetic, and non-toxic. Neon has an electron configuration of [He]2s22p6. Noble gases have complete outer electron shells, making them stable and less likely to form chemical bonds. It is categorised as one of the noble gases, along with argon, krypton, xenon, and helium.
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Question : The correct electronic configuration of Cu is:
Option 1: [Ar]3 d9 4 s2
Option 2: [Kr]3 d9 s2
Option 3: [Kr]3 d10 s1
Option 4: [Ar]3 d10 4 s1
Question : Which element of group 13 has the atomic number 113, and its electronic configuration is [Rn] 5f14 6d107s2 7p1?
Option 1: Gallium
Option 2: Indium
Option 3: Nihonium
Option 4: Thallium
Question : The least value of n, such that (1 + 3 + 32+.......+3n) exceeds 2000, is:
Option 1: 5
Option 3: 7
Option 4: 8
Question : Directions: In the following question, select the missing number from the given series. 4, 6, 6, 10, 8, 14, 10, 18, ?, 22
Option 1: 12
Option 2: 14
Option 3: 16
Question : Which of the following is the proper number of electrons in 1 A of current?
Option 1: 6.25 × 1021
Option 2: 6.25 × 1018
Option 3: 6.25 × 1019
Option 4: 6.25 × 1015
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