What is the identity of an element when the effective nuclear charge of its valence electrons is 18 while its shielding constant is 5?

Which of the following is the approximate effective nuclear charge (Z_eff) experienced by a valence electron in a bromine (Br) atom?

Which of the following periodic trends is inversely proportional to the effective nuclear charge, Z_ext{eff}?

Which of the following is NOT a property affected by the effective nuclear charge, Zeff?

Rank the effective nuclear charge (Z_ext{eff}) experienced by a valence electron in the following atoms: Na, Mg, Al. Which of the following correctly orders them from lowest to highest Z_ext{eff}?

For a multielectron atom, a 3s orbital lies lower in energy than a 3p orbital because (LO 5.16)(a) a 3p orbital has more nodal surfaces than a 3s orbital. (b) an electron in a 3p orbital has a higher probability of being closer to the nucleus than an electron in a 3s orbital.(c) inner electrons shield electrons in a 3p orbital more effec-tively than electrons in a 3s orbital. (d) the energy of the electron can be spread between three 3p orbitals instead of only one 3s orbital.

Among the elements N, O, P, and S, which element or elementshave the smallest effect nuclear charge if we use Equation7.1 to calculate Zeff? Which element or elements havethe largest effective nuclear charge?