Question

how many valence electrons does this element have? 1s²2s²2p⁴

Explanation:

Step1: Identify valence - shell electrons

Valence electrons are in the outermost shell. The outermost shell here is the second shell (n = 2).

Step2: Calculate number of valence electrons

For the second shell, we have \(2s^{2}2p^{4}\). The number of electrons in \(2s\) is 2 and in \(2p\) is 4. So, \(2 + 4=6\).

Answer:

6 (corresponding to the option with the value 6)