×

Learnhive Sign Up


By clicking on the above button you confirm that you are at least 13 years old and agree to our Terms of Service & Privacy Policy.
Already have a Learnhive account?
×

Science / Periodic Classification of Elements

Science / Periodic Classification of Elements

At present, 118 elements are known to us. It is important to organise all the information we know about these elements. This forms the basis of periodic table.

Elements are classified on the basis of similarities in their properties. Dobereiner grouped the elements into triads and Newlands gave the Law of Octave, but it was Mendel who arranged the elements in increasing order of their atomic masses and according to their chemical properties. He made a table containing all elements and called it periodic table.

Anomalies in arrangement of elements based on increasing atomic mass could be removed when the elements were arranged in order of increasing atomic number, a fundamental property of the element discovered by Moseley. He made the Modern Periodic Table.

Elements in the Modern Periodic Table are arranged in 18 vertical columns called groups. and 7 horizontal rows called periods. Elements thus arranged show periodicity of properties including atomic size, valency or combining capacity and metallic and non-metallic character.

Exercises
Lessons
Topics
Exercises
Lessons
Topics
  • Periodic Classification of Elements - SmartTest

    A Smart Test on Periodic Classification of Elements

    • Accessed by: 343 Students
    • Average Time: 00:03:24
    • Average Score: 56.41
    • Questions: 72
    • Introduction to Periodic Classification of Elements
    • Genesis Of Periodic Classification
    • The Modern Periodic table
    • Trends in the Modern Periodic Table
    • Review of Periodic Classification of Elements
    • Mendeleev's Periodic Table
    • Merits and Demerits of Mendeleev's Periodic Table
    • Periodic Properties
  • Periodic Table

    Learnhive Lesson on Periodic Table

    Merits and Demerits of Mendeleev Periodic Tab

    Learnhive Lesson on Merits and Demerits of Mendeleev Periodic Table

×

×

×

Learnhive Login

Some message