Respuesta :
Explanation:
Valence electrons -
It refers to the number of electrons that are present at the very last shell of the atom , is referred to as the valence electrons .
From the question ,
Carbon -
Atomic number = 6
electronic configuration is written as - 2, 4 .
Hence ,
Valence electrons = 4 .
Nitrogen -
Atomic number = 7
electronic configuration is written as - 2, 5 .
Hence ,
Valence electrons = 5 .
Oxygen -
Atomic number = 8
electronic configuration is written as - 2 , 6.
Hence ,
Valence electrons = 6 .
Chlorine -
Atomic number = 17
electronic configuration is written as - 2, 8, 7 .
Hence ,
Valence electrons = 7 .
Sulfur -
Atomic number = 16
electronic configuration is written as - 2 , 8, 6
Hence ,
Valence electrons = 6 .
Answer: C = 4 valence electrons
N = 5 valence electrons
O = 6 valence electrons
Cl = 7 valence electrons
S = 6 valence electrons
Explanation: Refer to each electron configuration:
C - 1s², 2s²,2p² valence e- add the exponents on the highest energy level which is period 2. So 2+2=4
N - 1s²,2s²,2p³ add the exponent in the 2nd orbital: 2+3 =5 valence electrons
O - 1s²,2s²,2p⁴ add the exponents in the 2nd orbital: 2 +4 = 6 valence electrons
Cl- 1s²,2s²,2p5 add the exponents in the 2nd orbital: 2 +5 = 7 valence electrons.
S- 1s²,2s²,2p⁴ add the exponents in the 2nd orbital: 2 + 4= 6 valence electrons.
