Question

An electrically neutral atom has the following electron configuration: 1s2,2s2,2p6,3s2,3p4. What is the name of this atom?

Answer 1

answer : Sulphur

explanation : electronic configuration of electrically neutral atom is given : $1s^2,2s^2,2p^6,3s^2,3p^4$

total number of electrons are present in atom = 2 + 2 + 6 + 2 + 4 = 16

we know, in atom number of protons equals number of electrons .

so, number of protons = 16 ,

atomic number is given by number of protons . so, atomic number = 16

If you check periodic table you get this atom is not other than sulphur.

sulphur is electrically neutral because it is non-metal. it is P - block element.and it has tendency to accept electrons. that's why it has nature to be electronegative ion.

Answer 2

Answer:

Explanation:

Atomic number for each element is unique. so, if we know the atomic number of any element, we can identify it.

Now, Atomic number is the number of protons present in any atom. In an electrically neutral atom, number of protons is equal to the number of electrons.

Given electronic configuration of electrically neutral atom =

1s² 2s²2p⁶ 3s²3p⁴

The numbers in superscript represent the number of electrons. On adding,

No. of electrons in the atom = 16

Since it is electrically neutral, number of protons = 16

Atomic number = number of protons = 16

From the periodic table, we can see that the element with atomic number 16 is Sulphur (S)