JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
Consider the elements N, P, O, S, Cl and F. The number of valence electrons present in the elements with most and least metallic character from the above list is respectively.
- A 7 and 5
- B 5 and 6
- C 5 and 7
- D 6 and 7
Answer & Solution
Correct Answer
(C) 5 and 7
Step-by-step Solution
Detailed explanation
Least metallic \(= F\), valence electrons \(= 7\) Most metallic \(= P\), valence electrons \(= 5\)
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
- Arrange the following in order of magnitude of work done by the system / on the system at constant temperature :
(a) \(\left|\mathrm{w}_{\text {reversible }}\right|\) for expansion in infinite stage.
(b) \(\left|w_{\text {irreversible }}\right|\) for expansion in single stage.
(c) \(\left|w_{\text {reversible }}\right|\) for compression in infinite stage.
(d) \(\left|w_{\text {irreversible }}\right|\) for compression in single stage.
Choose the correct answer from the options given below:JEE Mains 2025 Medium - Given below are two statements :
Statement I : When a system containing ice in equilibrium with water (liquid) is heated, heat is absorbed by the system and there is no change in the temperature of the system until whole ice gets melted.
Statement II : At melting point of ice, there is absorption of heat in order to overcome intermolecular forces of attraction within the molecules of water in ice and kinetic energy of molecules is not increased at melting point.
In the light of the above statements, choose the correct answer from the options given below:JEE Mains 2025 Medium - \(\mathrm{CrCl}_3 \cdot \mathrm{xNH}_3\) can exist as a complex. 0.1 molal aqueous solution of this complex shows a depression in freezing point of \(0.558^{\circ} \mathrm{C}\). Assuming \(100 \%\) ionisation of this complex and coordination number of Cr is 6 , the complex will be _______.
(Given \(\mathrm{K}_{\mathrm{f}}=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\) )JEE Mains 2025 Hard - One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes?JEE Mains 2024 Medium
- The molarity of a \(70 \%\) (mass \(/\) mass) aqueous solution of a monobasic acid \((\mathrm{X})\) is __________ \(\times 10^{-1}\) M.(Nearest integer)
[Given: Density of aqueous solution of (X) is \(1.25 \mathrm{~g} \mathrm{~mL}^{-1}\)
Molar mass of the acid is \(70 \mathrm{~g} \mathrm{~mol}^{-1}\) ]JEE Mains 2025 Hard - Match List \(I\) with List \(II\)
List \(I\) (Natural amino acid) List \(II\) (Code) \(A\) Glutamic acid \(I\) \(Q\) \(B\) Glutamine \(II\) \(W\) \(C\) Tyrosine \(III\) \(E\) \(D\) Tryptophan \(IV\) \(Y\) JEE Mains 2023 Medium
More PYQs from JEE Mains
- If \(\alpha\) is the positive root of the equation, \(p(x)=x^{2}-x-2=0,\) then \(\lim \limits_{x \rightarrow \alpha^{+}} \frac{\sqrt{1-\cos (p(x))}}{x+\alpha-4}\) is equal toJEE Mains 2020 Hard
- Which of the following reactions will yield benzaldehyde as a product?
JEE Mains 2022 Hard - Two sides of a rhombus are along the lines, \(x -y+ 1 = 0\) and \(7x-y-5 =0.\) If its diagonals intersect at \((-1,-2),\) then which one of the following is a vertex of this rhombus?JEE Mains 2016 Hard
- A parallel plate capacitor having a separation between the plates \(d\) , plate area \(A\) and material with dielectric constant \(K\) has capacitance \(C_0\). Now one-third of the material is replaced by another material with dielectric constant \(2K\), so that effectively there are two capacitors one with area \(\frac{1}{3}\,A\) , dielectric constant \(2K\) and another with area \(\frac{2}{3}\,A\) and dielectric constant \(K\). If the capacitance of this new capacitor is \(C\) then \(\frac{C}{{{C_0}}}\) isJEE Mains 2013 Hard
- Let \(\alpha, \beta \in \mathbb{R}\) be such that the system of linear equations
\(x + 2y + z = 5\)
\(2x + y + \alpha z = 5\)
\(8x + 4y + \beta z = 18\)
has no solution. Then \(\dfrac{\beta}{\alpha}\) is equal to :JEE Mains 2026 Medium - If \(\sum_{r=1}^{30} \frac{r^2\left({ }^{30} C_r\right)^2}{{ }^{30} C_{r-1}}=\alpha \times 2^{29}\), then \(\alpha\) is equal to ______JEE Mains 2025 Hard