Class 11ChemistryClassification of Elements and Periodicity in PropertiesMix Examples - Classification of Elements and Periodicity in Properties
MediumHow many of the following statements are correct?
$(a)$ 'He' is the second most abundant element in the universe.
$(b)$ The symbol for the element with atomic number $110$ is Ds.
$(c)$ Osmium has the highest density among all elements.
$(d)$ Francium is the most electropositive element in the periodic table.
$(a)$ 'He' is the second most abundant element in the universe.
$(b)$ The symbol for the element with atomic number $110$ is Ds.
$(c)$ Osmium has the highest density among all elements.
$(d)$ Francium is the most electropositive element in the periodic table.
- A$3$
- B$2$
- C$4$
- D$1$
Explore More
Similar Questions
Consider the following values of $IE$ $(eV)$ for elements $W$ and $X$:
Element $IE_1$ $IE_2$ $IE_3$ $IE_4$ $W$ $10.5$ $15.5$ $24.9$ $79.8$ $X$ $8$ $14.8$ $78.9$ $105.8$
Other two elements $Y$ and $Z$ have outer electronic configuration $ns^2 np^4$ and $ns^2 np^5$ respectively. According to the given information,which of the following compound$(s)$ is/are not possible?
$(a) W_2Y_3, (b) X_2Y_3, (c) WZ_2, (d) XZ_2$
| Element | $IE_1$ | $IE_2$ | $IE_3$ | $IE_4$ |
| $W$ | $10.5$ | $15.5$ | $24.9$ | $79.8$ |
| $X$ | $8$ | $14.8$ | $78.9$ | $105.8$ |
Other two elements $Y$ and $Z$ have outer electronic configuration $ns^2 np^4$ and $ns^2 np^5$ respectively. According to the given information,which of the following compound$(s)$ is/are not possible?
$(a) W_2Y_3, (b) X_2Y_3, (c) WZ_2, (d) XZ_2$
Difficult
View SolutionThe statement that is not correct for the periodic classification of elements is
MediumIIT 1992
View SolutionMatch the following elements with their respective blocks in the periodic table based on their atomic number $(Z)$:
Column-$I$ Column-$II$ $A. Z = 37$ $P. p-$ block $B. Z = 42$ $Q. f-$ block $C. Z = 34$ $R. d-$ block $D. Z = 92$ $S. s-$ block
| Column-$I$ | Column-$II$ |
|---|---|
| $A. Z = 37$ | $P. p-$ block |
| $B. Z = 42$ | $Q. f-$ block |
| $C. Z = 34$ | $R. d-$ block |
| $D. Z = 92$ | $S. s-$ block |
Difficult
View SolutionWhich of the following sequences represents the atomic numbers of only representative elements?
Difficult
View SolutionIn a period, the first ionisation enthalpy of the element at the extreme left and the negative electron gain enthalpy of the extreme right element, except noble gases, are respectively.
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo