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NTA Abhyas JEE Main2020ChemistryStructure of AtomPractice

The electronic configuration of few elements is given below. Mark the statement which is not correct about these elements. (i) 1 s 2 2 s 2 2 p 6 3 s 1 (ii) 1 s 2 2 s 2 2 p 5 (iii) 1 s 2 2 s 2 2 p 6 (iv) 1 s 2 2 s 2 2 p 3

Options

  1. A(i) is an alkali metal
  2. B(iii) is a noble metal
  3. C(i) and (ii) form ionic compounds
  4. D(iv) has high ionisation enthalpy than accepted

Correct answer

B. (iii) is a noble metal

Step-by-step solution

As (iii) has 1 s 2 2 s 2 2 p 6 type of noble gas configuration so it is an inert gas Neon not a metal.

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