Understanding Valency
Valency refers to the combining capacity of an element, which is determined by the number of electrons in its outermost shell.
Electron Configuration Overview
- The given electron configuration is 2, 8, 3.
- This indicates that the element has:
- 2 electrons in the first shell
- 8 electrons in the second shell
- 3 electrons in the third shell
Determining the Valency
- Valency is primarily influenced by the number of electrons in the outermost shell, also known as the valence shell.
- For the element with an electron configuration of 2, 8, 3:
- The outermost shell (third shell) contains 3 electrons.
Valency Calculation
- Elements tend to lose, gain, or share electrons to achieve a stable electron configuration, typically resembling that of noble gases.
- Since this element has 3 electrons in its outermost shell:
- It can lose these 3 electrons to achieve a stable configuration.
Conclusion
- Therefore, the valency of this element is 3, as it can form bonds by losing 3 electrons.
- The correct answer to the question is option 'B', which signifies a valency of 3.
This understanding of electron configuration helps predict how elements will react and bond with one another, forming the basis of chemical behavior.