Rank the following pairs of elements in terms of their electron affinities compared against each other.

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2) Which of the following statements is false concerning the first ionization energy of potassium? All the ionization energies listed below refer to first ionization energies.

Select one:

The IE of K is lower than IE of K+

The IE of K is lower than IE of Ca

The IE of K is lower than IE of Rb

The IE of K is lower than IE of Ar

The IE of K is lower than IE of Mg

3) Which of the following groups of elements all have 5 valence electrons?

Select one:

B / Al / Ga / In

Li / Na / K / Rb

F / Cl / Br / I

C / Si / Ge / Sn

N / P / As / Sb

O / S / Se / Te