calucate the affective nuclear charge of sodium,chorine ,skandium,florin,argon
Answers
Answer:
The reduction produced in the force of attraction due to the presence of intervening electrons is called “shielding effect".
The nuclear charge is decreased by the quantity, “sigma" which is called screening constant.
This decreased nuclear charge is equal to (Z - sigma) is called effective nuclear charge and is denoted by “Zeff”. Or effective nuclear charge (Zeff) is defined as the actual nuclear charge(Z or Z.actual) minus the screening constant(sigma) produced by the electrons residing between the nucleus and the outer-most shell electron(intervening electron).
Zeff = Z - sigma
Sigma is a measure of the extent to which the intervening electrons screen the outer-most shell electron from the nuclear pull on it.
For determining effective nuclear charge on sodium(Na), we apply Slater's rules for calculating sigma and Zeff. These rules are given below:
a) Each of the remaining electrons in the nth shell makes a contribution of 0.35 to the value of sigma.
b) Each of the electrons in(n - 1) th shell makes a contribution of 0.85.
c) Each of the electrons in the next inner shells makes a contribution of 1.0.
d) If sigma is being calculated for an electron of 1s orbital, there will be a contribution of 0.30 from other single electron in 1s orbital. Thus sigma for an electron residing in ns or np orbital = 0.35 x (no. of remaining electrons in nth shell) + 0.85 x (no. of electrons in n - 1th shell) + 1.0 x (no. of electrons in the inner shell)
Now we apply this for sodium(Na),
Na(Z=11) = 1s2(K- shell) 2s2,2p6(L-shell) 3s1(M-shell)
Sigma for 3s1 electron(M-shell electron) = (0.35 x 0) + (0.85 x 8) + (1.0 x 2) = 8.8
Zeff experienced by 3s1 electron = 11 - 8.8= 2.2
hendikeps2 and 10 more users found this answer helpful
THANKS
8
2.5
(2 votes)
Log in to add comment
Still have questions?
FIND MORE ANSWERS
ASK YOUR QUESTION
New questions in Chemistry
Which element has(a) two shells, both of which are completely filled with electrons?(b) the electronic configuration 2, 8, 2?(c) a total of three shel …
Calculate the molality of a solution of NaOH containing 20g of NaOH in 400 g solvent.
which ion contain cation exchange resin
Assertion: The value for Vander waal's constant 'a' is higher for NH3 than for NReason: Inter molecular hydygen bonding ispresent in NH3
A 100uL serum was added with 100uL NSS for ALT determination. The serum ALT level after the dilution is 380 U/L. How much will be true ALT level?
is there any mnemonic to remember the types of vector??? Please help ☺☺❤❤❤ ╥﹏╥╥﹏╥╥﹏╥ಥ‿ಥಥ‿ಥxd
calucate the affective nuclear charge of sodium,chorine ,skandium,florin,argon
different between mixture and compound
What is the electron configuration for sulfur? A. 1s2 2s2 2p6 3s2 3p4 B. 1s2 1p6 2s2 2p6 3s2 C. 1s2 2s2 2p6 3s2 3p3 4s1 D. 1s2 2s2 2p6 3p1 3d5
The resistance of conductor is proportional to
Previous
Next
Ask
Answer:
Can you inbox me plz plz I am requesting you plz!