Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a comma.
Equation 7.1: Zeff=Z-S
Zeff Cl-, Zeff K+
17Cl = 1s2 2s2 2p6 3s2 3p6
Z = 17
S = 12
Use Equation 7.1 and assuming that core electrons contribute 1.00 and valence electrons contribute nothing to the screening constant, S, calculate Zeff} for these two ions. Express your answers as integers. Enter your answers numerically separated by a comma.
Equation 7.1: Zeff=Z-S
Zeff Cl-, Zeff K+
5.75,7.75
To calculate the effective nuclear charge (Zeff) for Cl- and K+ ions using Equation 7.1, we need to determine the values for Z and S.
For Cl- (Chloride ion), we need to note that Cl has an atomic number (Z) of 17. Since Cl- has gained one electron, the number of valence electrons contributing to the screening constant (S) is 0, as stated in the problem. Therefore, we have:
Zeff = Z - S
Zeff(Cl-) = 17 - 0
Zeff(Cl-) = 17
For K+ (Potassium ion), K has an atomic number (Z) of 19. Since K+ has lost one electron, the number of valence electrons contributing to the screening constant (S) is still 0, according to the problem. Thus, we have:
Zeff = Z - S
Zeff(K+) = 19 - 0
Zeff(K+) = 19
Therefore, Zeff for Cl- is 17 and Zeff for K+ is 19.