KCET · Chemistry · Structure of Atom
The set of quantum numbers for the outermost electron for copper in its ground state is
- A \(4,1,1,+\frac{1}{2}\)
- B \(3,2,2,+\frac{1}{2}\)
- C \(4,0,0,+\frac{1}{2}\)
- D \(4,2,2,+\frac{1}{2}\)
Answer & Solution
Correct Answer
(C) \(4,0,0,+\frac{1}{2}\)
Step-by-step Solution
Detailed explanation
The electronic configuration of the Cu atom is
\[
{ }_{29} \mathrm{Cu}=[\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^{1}
\]
Since, the outermost shell is \(4 \mathrm{~s}\), thus outermost electron is in it.
For \(4 \mathrm{~s}^{1}\),
\[
\mathrm{n}=4, \quad \mathrm{l}=0, \quad \mathrm{~m}=0, \quad \mathrm{~s}=+\frac{1}{2}
\]
\[
{ }_{29} \mathrm{Cu}=[\mathrm{Ar}] 3 \mathrm{~d}^{10} 4 \mathrm{~s}^{1}
\]
Since, the outermost shell is \(4 \mathrm{~s}\), thus outermost electron is in it.
For \(4 \mathrm{~s}^{1}\),
\[
\mathrm{n}=4, \quad \mathrm{l}=0, \quad \mathrm{~m}=0, \quad \mathrm{~s}=+\frac{1}{2}
\]
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Chemistry
- When sulphur dioxide is passed in an acidified \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) solution, the oxidation state of sulphur is changed fromKCET 2008 Easy
- A given sample of milk turns sour at room temperature \(\left(27^{\circ} \mathrm{C}\right)\) in \(5 \mathrm{~h}\). In a refrigerator at \(-3^{\circ} \mathrm{C}\), it can be stored 10 times longer. The energy of activation for the souring of milk isKCET 2012 Easy
- Which one of the following is a covalent crystal?KCET 2011 Easy
- Bond enthalpies of \(A_{2}, B_{2}\) and \(A B\) are in the ratio \(2: 1: 2\). If bond enthalpy of formation of \(A B\) is \(-100 \mathrm{~kJ} \mathrm{~mol}^{-1}\). The bond enthalpy of \(B_{2}\) isKCET 2021 Medium
- Which one of the following does not involve coagulation?KCET 2011 Medium
- Given below and the atomic masses of the elements:
\begin{array}{|l|l|l|l|l|l|l|l|l|l|}
\hline \text { Element: } & \mathrm{Li} & \mathrm{Na} & \mathrm{Cl} & \mathrm{~K} & \mathrm{Ca} & \mathrm{Br} & \mathrm{Sr} & \mathrm{I} & \mathrm{Ba} \\
\hline \text { Atomic Mas }\left(\mathrm{g} \mathrm{~mol}^{-1}\right): & 7 & 23 & 35.5 & 39 & 40 & 80 & 88 & 127 & 137 \\
\hline
\end{array}
Which of the following doesn't form triad?KCET 2025 Easy
More PYQs from KCET
- Which compounds were used by Miller in his experiment for obtaining amino acids and other organic substances?KCET 2014 Easy
- Consider the following statements in case of Young's double slit experiment.
(1) A slit \(S\) is necessary if we use an ordinary extended source of light.
(2) A slit \(S\) is not needed if we use an ordinary but well collimated beam of light.
(3) A slit \(S\) is not needed if we use a spatially coherent source of light.
Which of the above statements are correct?KCET 2011 Easy - The centrosome duplicates during theKCET 2014 Easy
- A mass M is hung with a light inextensible string as shown in figure. Find the tension of the horizontal string.
KCET 2026 Medium - The value of if \( x(\hat{i}+\hat{j}+\hat{k}) \) is a unit vector isKCET 2016 Easy
- \(\mathrm{N}_{2}+3 \mathrm{H}_{2} \rightleftharpoons 2 \mathrm{NH}_{3}+\) heat. What is the effect of the increase of temperature on the equilibrium of the reaction?KCET 2008 Easy