Arrange the following atoms or ions in order of increasing size: Be2+, Al 3+, K, Ca2+ Be2+< Al 3+< Ca²+ < K Ca2+ K Be2+ < Al 3+ < Be2+ K < Al 3+< Ca²+ Al 3+< Ca2+ Be 2+< K

||| K 91 alaccd sign in - X C esc U 1 O ELECTRONIC STRUCTURE AND CHEMICAL BONDING Writing the electron configuration of an atom using the Periodic... 23 V Write the electron configuration of an atom of the element highlighted in this outline of the Perio 4 f1 5 19 6 7 Explanation Hint: you do not need to know the name or symbol of the highlighted element! ALEKS McGraw-Hill Ed X A ALEKS - Shush. X ps://www-awu.aleks.com/alekscgi/x/Isl.exe/1o_u-IgNslkr7j8P3jH-IvUrTNdLZh5A8CnG03PBGUXE ? Type here to search f2 2 Check X f3 # 3 Mc Graw HI E f4 GA AUT 4 O R f5 % 4 5 ㄱ 1 0 BE f7 hp 4+ Y 7 ALEKS f8 He Ne Ar Kr Xe Rn X TE © 2022 McGraw Hill LLC. a * 8 DII 9

13

Rank the following ions from smallest to largest size. Rb Sr2+ Se²- A B C (Enter the letter corresponding to each species.) smallest = = largest

Among the following ions, several pairs are isoelectronic i.e. have the same number of electrons. Identify these pairs.  Fe2+, Sc3+, Ca2+, F-, Co2+, Co3+, Sr2+, Cu+, Zn2+, Al3+

7. Explain the difference of atomic radii among the following atoms/ions with your understanding of effective nuclear charge and the addition of shells down the row. a) Ca > Ca2+ c) H- > He b) Sr > Cd d) P3- > S2-

Which of the following correctly ranks the ions Ca2+, S2–, K+, Cl–, and H+ in order of increasing size? A) Cl–< K+ < S2– < H+ < Ca2+ B) S2– < Ca2+ < K+ < Cl– < H+ C) H+ < Ca2+ < K+ < Cl– < S2– D) H+ < Cl– < Ca2+ < S2– < K+ E)  H+ < S2– < Cl– < Ca2+ < K+

Arrange the following sets of ions in order of decreasing ionic radii. (a) Br,I, S² , Se²- (b) Ba2+, Ca?+ Sr²+

Which ions in the following list are not likely to be found in chemical compounds: K2+, Cs+,Al4+, F2−, and S2+? Explain briefly.

Arrange the ions in order of decreasing radius: Rb+, Br-, Se2-, Sr2+.