Electronic Configuration of the Atoms

Find the number of valence electrons in the following elements by writing the electronic configuration in their atoms.

Chlorine

Find the number of valence electrons in the following elements by writing the electronic configuration in their atoms.

Sulphur

Give the geometrical representations of electronic arrangements of the following element:

• Phosphorus

Find the number of valence electrons in the following elements by writing the electronic configuration in their atoms.

Nitrogen

M-shells of two elements A and B have $18$ electrons. The difference in the number of electrons present in N-shell of A and B is $8$. The M-shell is the penultimate shell in B. Predict the range of probable atomic numbers of A and B.

An atom of an element has one electron in the valence shell and two consecutive inner shells have $8$ electrons each. Find the atomic number of that element. Write the electronic configuration of preceding and succeeding elements.

Based on the information given in the below three statements, answer the following question.

(i) Element X has two valence electrons in the M-shell.
(ii) In element Y, the electrons are distributed in the first three shells. It has eight electrons in the M-shell.
(iii) Element Z has eight electrons in the penultimate shell, i.e., M.

What is the atomic number of Z in which the number of electrons in the first and the last shell are not the same?

Based on the information given in the below three statements, answer the following question.

(i) Element X has two valence electrons in the M-shell.
(ii) In element Y, the electrons are distributed in the first three shells. It has eight electrons in the M-shell.
(iii) Element Z has eight electrons in the penultimate shell, i.e., M.

In which atom of an element is the number of electrons distributed in all the four shells?

Based on the information given in the below three statements, answer the following question.

(i) Element X has two valence electrons in the M-shell.
(ii) In element Y, the electrons are distributed in the first three shells. It has eight electrons in the M-shell.
(iii) Element Z has eight electrons in the penultimate shell, i.e., M.

Which element is stable among X, Y and Z and why?

Based on the information given in the below three statements, answer the following question.

(i) Element X has two valence electrons in the M-shell.
(ii) In element Y, the electrons are distributed in the first three shells. It has eight electrons in the M-shell.
(iii) Element Z has eight electrons in the penultimate shell, i.e., M.

Give the electronic configuration of X.

The dipositive and dinegative ions of different elements possesses an octet configuration in their third shell. Find out the atomic number and mass number of valence electrons in their neutral atoms.

The electronic configuration of an atom A is $\mathrm{a}, \mathrm{a}+\mathrm{b}, \mathrm{a}+2\mathrm{b}, \mathrm{a}$ and that of B is $\mathrm{a}, \mathrm{a}+\mathrm{b}, 3\mathrm{a}+2\mathrm{b}, \mathrm{b}$. Write the electronic configuration of A and B.

If the maximum permissible orbits of elements in nature are limited to $\mathrm{n}=4$, what are the number of possible elements?

A stable neutral atom of an element contains three fully filled orbits. Find the atomic number of the element.

An atom of an element has two electrons in the valence shell and two consecutive inner shells have $8$ electrons each. Calculate atomic number of element.

Identify the atomic number corresponding to least number of valence electrons.

Which among the following set of elements contain same number of valence electrons?

Identify the electronic configuration of manganese $\left(\mathrm{Z}=25\right)$.

The ratio of the number of electrons in the N-shell of A and the M-shell of B with atomic number $40$ and $32$, respectively, is:

Total number of electrons present in the penultimate shell of an element with atomic number $36$ is: