5 . Which equation represents the process associated with the electron affinity? (A) X (g) – →X+e (g) (B) X (g) – -→X ()+e (C) X (g) + e 2+ (D) X (g)- X (g)+e >X (g) +e 2- E) X (g) + e -

(1) What is the name of the element with a valence electron configuration of 2s22p3?fill in the blank 1(2) What is the name of the element with a valence electron configuration of 3s2?

Arrange in order of increasing ionization energy (a) the Group 1A elements Na, Cs, and K(b) the Period 4 elements As, Ca, and Br

4. Write an appropriate set of four quantum numbers (n, l, ml & ms) that could be representative of a valence electron in each of the following atoms or ions. (a) Bi (m (b) Sr (c) Mo (d) Ru2+ (e) Eu

What is the identity of the ion with an electron configuration [Xe]4f145d9 and has a charge of +4?

la) For each of the following pairs indicate which element you would expect to have the larger First Ionization Energy and which one would have the larger radius: (a) Ca and Cl; (b) Sn and Tl; (c) Ba and Bi (d) Fr and Cs b) For each pair indicate which Ion you would expect to have the largest Radius: (a) 0²- and O; (b) N³ and Mg²+ (c) Al3* and Al ne Ele

Choose the option in each that has the desired characteristic. Briefly explain each of your choices. (a) Larger Size? Si or Cl (b) Lower IE1? P or Po (c) Better Electron Affinity? O or F (d) Smaller Size? Br or Te2-