Chemistry · JEE

Important Questions: Electronic configuration of elements and extra stability of half-filled and completely filled orbitals for JEE

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Part of Atomic Structure in JEE Main Chemistry.

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Q1ChemistryUnit 2: Atomic Structure

element has one electron in the outermost shell and attains duplet configuration after accepting one more electron and attains stability.

Q2ChemistryUnit 2: Atomic Structure

Statement I: Ground state electronic configuration of chromium atom is

(A r) 4 s^{1} 3 d^{5}

Statement II: Exchange energy is more wtih

(\boldsymbol{A} \boldsymbol{r}) \boldsymbol{4} \boldsymbol{s}^{1} \boldsymbol{3} \boldsymbol{d}^{5}

then

(\boldsymbol{A} \boldsymbol{r}) \boldsymbol{4} \boldsymbol{s}^{2} \boldsymbol{3} \boldsymbol{d}^{4}

Q3ChemistryUnit 2: Atomic Structure

Which of the following has

n s^{2} n p^{6} n d^{10}

(n+1) s^{0}

configuration?

Q4ChemistryUnit 2: Atomic Structure

Which of the properties of isotopes of an element is different?

Q5ChemistryUnit 2: Atomic Structure

Which of the following is not true for

\mathbf{1} \boldsymbol{H}^{1}, \mathbf{1} \boldsymbol{H}^{2}, \mathbf{1} \boldsymbol{H}^{3} \mathbf{?}

Q6ChemistryUnit 2: Atomic Structure

The stability of ferric ion is due to

Q7ChemistryUnit 2: Atomic Structure

Which amongst the following can lose 2 electrons to acquire the configuration of argon?

Q8ChemistryUnit 2: Atomic Structure

Electronic configuration

[\boldsymbol{K} \boldsymbol{r}] \boldsymbol{4} \boldsymbol{d}^{10}

belongs to:

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Key areas include Electronic configuration of elements and extra stability of half-filled and completely filled orbitals. Prioritise these before moving to edge cases.

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