State the Periodic Law on which the Modern Periodic Table is based.

Academic Chemistry NCERT Class 10

According to the modern periodic law, the properties of elements are a periodic function of their atomic numbers.

(This law means that if the elements are arranged in increasing order of their atomic numbers, the elements having similar properties will repeat after regular intervals of periods.)

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Updated on: 10-Oct-2022

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(a) State the periodic law on which Mendeleev’s periodic table was based. Why and how was this periodic law changed ?(b) Explain why, the noble gases are placed in a separate group.
The basis for Modern Periodic Table is ______________.
How could the modern periodic table remove various anomalies of Mendeleev’s Periodic Table?
(a) State modern periodic law.(b) How does the electronic configuration of the atom of an element relate to its position in the modern periodic table? (c) How could the modern periodic law remove various anomalies of Mendeleev’s periodic table? Explain with examples. (d) Is it possible to have an element having atomic number 1.5 placed between hydrogen and helium ? (e) Name the scientist who prepared modern periodic table.
Development of Modern Periodic Table
Which of the following statement (s) about the Modern Periodic Table are incorrectThe elements in the Modern Periodic Table are arranged based on their decreasing atomic numberThe elements in the Modern Periodic Table are arranged based on their increasing atomic massesIsotopes are placed in adjoining group (s) in the Periodic TableThe elements in the Modern Periodic Table are arranged based on their increasing atomic number(a) (i) only(b) (i), (ii) and (iii)(c) (i), (ii) and (iv) (d) (iv) only
Compare and contrast the arrangement of elements in Mendeleev’s Periodic Table and the Modern Periodic Table.
Electronegativity of Elements in Modern periodic Table
In the modern periodic table, which are the metals among the first ten elements?
What is the Periodic Table?
Electron Gain Enthalpy of Elements in Modern Periodic Table
(a) On which side of the periodic table will you find metals?(b) On which side of the periodic table will you find non-metals? (c) What is the name of those elements which divide metals and non-metals in the periodic table?
(a) How were the positions of isotopes of an element decided in the modern periodic table?(b) How were the positions of cobalt and nickel resolved in the modern periodic table? (c) Where should hydrogen be placed in the modern periodic table? Give reason for your answer.
“Hydrogen occupies a unique position in Modern Periodic Table”. Justify the statement.
Total number of non-metal in the modern periodic table with their name.

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