1.

Lithum effective nuclearcharge​

Answer»

Explanation:

In the example USING a lithium atom, Z EQUALS 3 (the atomic NUMBER of lithium) and S equals 1.7. By changing the variables in the formula to the correct values for the example, it BECOMES Zeff = 3 - 1.7. The value of Zeff (and thus the effective nuclear charge of the 2s electron in a lithium atom) is 1.3.



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