객관식
How many valence electrons does a neutral carbon atom have?
89
views
9. Electrons in Atoms and the Periodic Table
Valence Electrons of Elements (Simplified)
객관식
How many valence electrons does a neutral nitrogen atom have?
A
3
B
7
C
5
D
8
검증된 단계별 안내1
Recall that valence electrons are the electrons in the outermost shell of an atom, which are important for chemical bonding.
Determine the atomic number of nitrogen, which is 7. This means a neutral nitrogen atom has 7 electrons in total.
Write the electron configuration of nitrogen to see how these 7 electrons are distributed among the shells: \$1s^2 2s^2 2p^3$.
Identify the outermost shell (the second shell in this case) and count the electrons in that shell: \$2s^2\( and \)2p^3$ add up to 5 electrons.
Conclude that the number of valence electrons in a neutral nitrogen atom is 5, as these are the electrons available for bonding.
관련 영상
관련 실천
