Class 10SciencePeriodic Classification of ElementsMix Examples - Periodic Classification of Elements
Medium$(a)$ State the main characteristics of elements on which the modern periodic table is based.
$(b)$ No fixed position can be assigned to hydrogen in the periodic table. Why?
$(b)$ No fixed position can be assigned to hydrogen in the periodic table. Why?
(N/A) The modern periodic table is based on the atomic number of elements and the electronic configuration (number of valence electrons).
$(b)$ Hydrogen shows dual behavior:
$1.$ Like alkali metals,it has one valence electron and forms positive ions $(H^+)$ by losing an electron.
$2.$ Like halogens,it is a non-metal,exists as a diatomic molecule $(H_2)$,and forms covalent compounds by sharing electrons.
Due to these properties resembling both groups,it cannot be assigned a fixed position.
$(b)$ Hydrogen shows dual behavior:
$1.$ Like alkali metals,it has one valence electron and forms positive ions $(H^+)$ by losing an electron.
$2.$ Like halogens,it is a non-metal,exists as a diatomic molecule $(H_2)$,and forms covalent compounds by sharing electrons.
Due to these properties resembling both groups,it cannot be assigned a fixed position.
Explore More
Similar Questions
An element $X$ which is a yellow solid at room temperature shows catenation and allotropy. $X$ forms two oxides which are also formed during the thermal decomposition of ferrous sulphate crystals and are the major air pollutants.
$(a)$ Identify the element $X$
$(b)$ Write the electronic configuration of $X$
$(c)$ Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
$(a)$ Identify the element $X$
$(b)$ Write the electronic configuration of $X$
$(c)$ Write the balanced chemical equation for the thermal decomposition of ferrous sulphate crystals?
Medium
View SolutionWhich of the following elements would lose an electron easily?
Easy
View SolutionWhich group of elements could be placed in Mendeleev's Periodic Table without disturbing the original order? Give reason.
Medium
View SolutionList any two properties of the elements belonging to the first group of the modern periodic table.
Easy
View SolutionState the reason for the following:
$(a)$ The elements of the same group have similar chemical properties.
$(b)$ The elements of the same period have different properties.
$(a)$ The elements of the same group have similar chemical properties.
$(b)$ The elements of the same period have different properties.
Easy
View SolutionVedclass 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