JEE Mains · Chemistry · STD 11 - 3. Classification of elements and periodicity in properties
The atomic number of the element unnilennium is
- A \(119\)
- B \(108\)
- C \(102\)
- D \(109\)
Answer & Solution
Correct Answer
(D) \(109\)
Step-by-step Solution
Detailed explanation
\(1\) \(0\) \(9\) \(un\) \(nil\) \(enn\) Hence correct name \(\rightarrow\) unnilennium
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
- Consider the following gas phase reaction being carried out in a closed vessel at \(25°C\).
\(2A(g) \rightarrow 4B(g) + C(g)\)
The pressure of \(C(g)\) at \(30\) minutes time interval would be _______ mm Hg. (nearest integer)time (min) total pressure of the system (mm Hg) \(30\) \(300\) \(\infty\) \(600\) JEE Mains 2026 Hard - The solubility product constants of \(Ag_2CrO_4\) and \(AgBr\) are \(32x\) and \(4y\) respectively at \(298\) K. The value of \(\left(\dfrac{\text{molarity of } Ag_2CrO_4}{\text{molarity of } AgBr}\right)\) can be expressed as :JEE Mains 2026 Medium
- Number of spectral lines obtained in \(\mathrm{He}^{+}\)spectra, when an electron makes transition from fifth excited state to first excited state will be _______.JEE Mains 2024 Hard
- The oxidation states of iron atoms in compounds \((A),\) \((B)\) and \((C),\) respectively, are \(x,\) \(y\) and \(z.\) The sum of \(x, y\) and \(z\) is........ \((A)\) \(\left. Na _{4}\left[ Fe ( CN )_{5} NOS \right)\right]\) \((B)\) \(Na _{4}\left[ FeO _{4}\right]\) \((C)\) \(\left[ Fe _{2}( CO )_{9}\right]\)JEE Mains 2020 Medium
- The calculated spin-only magnetic moments of \(\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{OH})_6\right]\) and \(\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{OH})_6\right]\) respectively are _______.JEE Mains 2025 Medium
- \(C_{60},\) an allotrope of carbon containsJEE Mains 2019 Hard
More PYQs from JEE Mains
- pH of water is 7 at \(25^{\circ} \mathrm{C}\). If water is heated to \(80^{\circ} \mathrm{C}\)., it's pH will :JEE Mains 2025 Easy
- A particle of mass \(0.50 \mathrm{~kg}\) executes simple harmonic motion under force \(\mathrm{F}=-50\left(\mathrm{Nm}^{-1}\right) \mathrm{x}\). The time period of oscillation is \(\frac{x}{35} s\). The value of \(x\) is _______. (Given \(\pi=\frac{22}{7}\) )JEE Mains 2024 Hard
- Let \(\bar{a}=\hat{i}+\hat{j}+\hat{k}, \vec{b}\) and \(\vec{c}=\hat{j}-\hat{k}\) be three vectors such that \(\vec{a} \times \vec{b}=\vec{c}\) and \(\vec{a} \cdot \vec{b}=1\). If the length of projection vector of the vector \(\vec{b}\) on the vector \(\vec{a} \times \vec{c}\) is \(l\), then the value of \(3l^{2}\) is equal to \(.....\)JEE Mains 2021 Medium
- Let \(A=\begin{bmatrix} 1 & 2 & 7 \\ 4 & -2 & 8 \\ 3 & 8 & -7 \end{bmatrix}\) and \(\det(A-\alpha I)=0\), where \(\alpha\) is a real number. If the largest possible value of \(\alpha\) is \(p\), then the circle \((x-p)^2+(y-2p)^2=320\), intersects the co-ordinate axes atJEE Mains 2026 Hard
- Let \(A=\{-4,-3,-2,0,1,3,4\}\) and \(R =\{( a , b ) \in A\) \(\times A : b =| a |\) or \(\left.b ^2= a +1\right\}\) be a relation on \(A\). Then the minimum number of elements, that must be added to the relation \(R\) so that it becomes reflexive and symmetric, is \(........\).JEE Mains 2023 Medium
- A plane electromagnetic wave of wavelength \(\lambda \) has an intensity \(I.\) It is propagating along the positive \(Y-\) direction. The allowed expressions for the electric and magnetic fields are given byJEE Mains 2018 Medium