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)