To determine the name of the element based on its electron configuration, follow these steps:
1. Understand the Electron Configuration Notation:
The notation [tex]\( 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^{10} 4p^6 5s^2 4d^{10} 5p^5 \)[/tex] represents the distribution of electrons across different orbitals and energy levels.
2. Total the Number of Electrons:
Each superscript number indicates the number of electrons in that particular subshell. Summing these numbers will give the total number of electrons in the atom.
- [tex]\(1s^2\)[/tex]: 2 electrons
- [tex]\(2s^2\)[/tex]: 2 electrons
- [tex]\(2p^6\)[/tex]: 6 electrons
- [tex]\(3s^2\)[/tex]: 2 electrons
- [tex]\(3p^6\)[/tex]: 6 electrons
- [tex]\(4s^2\)[/tex]: 2 electrons
- [tex]\(3d^{10}\)[/tex]: 10 electrons
- [tex]\(4p^6\)[/tex]: 6 electrons
- [tex]\(5s^2\)[/tex]: 2 electrons
- [tex]\(4d^{10}\)[/tex]: 10 electrons
- [tex]\(5p^5\)[/tex]: 5 electrons
3. Sum the Electrons:
[tex]\[
2 + 2 + 6 + 2 + 6 + 2 + 10 + 6 + 2 + 10 + 5 = 53
\][/tex]
The total is 53 electrons.
4. Identify the Element:
The atomic number of an element corresponds to the number of protons, which is equal to the number of electrons in a neutral atom. The element with atomic number 53 is iodine.
Therefore, the name of the element is iodine.
