Question

1.
Explain the postulates of Bohr's atomic model.

2.
Write down electronic configuration of S", F and Ca and identify their groups and
periods

3.
Draw Bohr atomic model for Ar" and K. Indicate the position of electrons, protons
and neutrons.

4.
Why periodic table is divided into four blocks? What is the basic criteria for placement
of elements in these groups? Explain with examples.


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Answer 1

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1.The Bohr model postulates that electrons orbit the nucleus at fixed energy levels. Orbits further from the nucleus exist at higher energy levels. When electrons return to a lower energy level, they emit energy in the form of light.

2.The electronic configuration of an element is related to its position on the periodic table. The links are: ... the number of electrons in the outermost shell of an element is represented in the periodic table as the group number that element is situated in.

use this formula to get ur answer.

3. for this answer refer the pic

4.Each block is named after its characteristic orbital: s-block, p-block, d-block, and f-block.