Question

Write the number of protons, electrons, and neutrons present in ${}_1{}^1\mathrm{H}$ element. Give the electronic configuration and draw the atomic diagram.

Answer 1

Atom is represented with its symbol having an atomic number in subscript and mass number in superscript. Symbolic representation is mentioned below :

For given element ${}_1{}^1\mathrm{H}$ :

Part-1 Find number of protons, electrons and neutrons:

The atomic number $\left(\mathrm{Z}\right)$ of an element is equal to the total number of protons present in the nucleus of the atom.

$\mathrm{Atomic}\mathrm{number}=\mathrm{number}\mathrm{of}\mathrm{protons}=\mathrm{number}\mathrm{of}\mathrm{electrons}(\mathrm{for}\mathrm{electrically}\mathrm{neutral}\mathrm{atom})$

The atomic number of hydrogen is $1$, so it has $1$ protons and hence number of electrons are also $1$.

The mass number of elements is equal to the sum of the total number of protons and neutrons present in the nucleus of the atom.

$\mathrm{Mass}\mathrm{number}=\mathrm{number}\mathrm{of}\mathrm{protons}+\mathrm{number}\mathrm{of}\mathrm{neutrons}$

Also, $\mathrm{number}\mathrm{of}\mathrm{neutrons}=\mathrm{mass}\mathrm{number}-\mathrm{number}\mathrm{of}\mathrm{protons}$

The number of neutrons in Hydrogen$=$$1-1=0$.

Therefore, hydrogen have $1$protons, $1$electrons and $0$neutrons.

Part-2 Electronic configuration

Electronic configuration describes the distribution of electrons in different shells like $\mathrm{K},\mathrm{L},\mathrm{M},\mathrm{N}....$with principal quantum number $\left(\mathrm{n}\right)$ value $1,2,3,4...$respectively. According to formula $2{\mathrm{n}}^2$, maximum $2$ electrons can be filled in $\mathrm{K}$shell, $8$ in $\mathrm{L}$ and so on according to the formula. Therefore, an electronic configuration is $1$.

Shell	$\mathrm{K}$
Number of electrons filled	$1$

Part-3 Atomic Diagram: