Name: Bohr's Model
Uploaded: 2019-07-19
Duration: 2 min 50 s
Description: Do you know how the concept of orbits or shells of an atom was found? It was explained by an atomic model, which was given by Niels Bohr. Let's watch this vi...

Question

Find the electron distribution for the element that has atomic number

17

and write its valency.

Accepted Answer

The element has an atomic number $17$ and therefore contains $17$ electrons. The maximum number of electrons that could be present in a shell is given by the rule $2 n^{2}$ , where n is the shell number. That is the first shell K shell can accommodate a maximum of $2$ electrons, second shell L can accommodate a maximum of $8$ electrons and the remaining $7$ electrons will enter into M shell. Thus, the electronic configuration of the element is $2, 8, 7$ .

The number of valence electrons of an element that is actually involved in chemical reactions is called the valency of that element. Valency of an element is the measure of combining capacity with other atoms when it forms a chemical compound or molecule. Chlorine is in need of one more electron to attain a stable octet configuration and therefore ready to accept an electron and becomes anion with octet configuration. Thus, the valency of chlorine is $1$ .

Find the electron distribution for the element that has atomic number $17$ and write its valency.

Important Questions on Structure of the Atom

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