Given the electron configuration $$1s^{2}$$ $$2s^{2}$$ $$2p^{6}$$ $$3s^{2}$$ $$3p^{6}$$ $$4s^{1}$$, identify the number of valence electrons.

9. Electrons in Atoms and the Periodic Table - 4! 3부

9. Electrons in Atoms and the Periodic Table / Valence Electrons of Elements (Simplified) / 문제 18

문제 18

Given the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁶ 4s¹, identify the number of valence electrons.

6 valence electrons

10 valence electrons

1 valence electron

2 valence electrons