|AP Chemistry - Worksheet #2|
|Atomic and Ionic Size Worksheet|
|1.||What is the meaning of effective nuclear charge? How does the effective nuclear charge felt by the outer electrons vary going down a group? How does it change as we go from left to right across a period?|
|2.||Choose the larger atom in each pair:
(a) Na or Si;
(b) P or Sb.
|3.||Choose the larger atom in each pair:
(a) Al or Cl;
(b) Al or In.
|4.||Choose the largest atom from among the following: Ge, As, Sn, Sb.|
|5.||In what region of the periodic table are the largest atoms found? Where are the smallest atoms found?|
|6.||Place the following in order of increasing size: N3-, Mg2+, Na+, F-, O2-, Ne.|
|7.||Why are the size changes among the transition elements more gradual than those among the representative elements?|
|8.||Choose the larger particle in each pair:
(a) Na or Na+;
(b) Co3+ or Co2+;
(c) Cl or Cl-.
|9.||Use the periodic table to choose the largest atom or ion in each
(a) Ge, Te, Se, Sn;
(b) C, F, Br, Ga;
(c) Fe, Fe2+, Fe3+ ;
(d) O, O2-, S, S2-
|10.||Which ion would be larger:
(a) Fe2+ or Fe3+,
(b) O- or O2-?
|11.||What two factors are most important in determining the size of an atom?|
|12.||Explain the relative sizes of the atoms within a given group of the periodic table. Illustrate your answer with specific examples.|
|13.||Compare the relative sizes of neutral atoms and their positive ions.|
|14.||List the following particles in order of decreasing size: Kr, Sr2+, Rb+.|
|15.||Compare the sizes of a negative ion and its neutral atom. Illustrate with specific examples.|
|16.||List the following particles in order of decreasing size: K+, Ar, S2-, Cl-, Ca2+.|
|17.||Arrange the following elements in increasing order of their atom's size. Ca, Ba, Be|
|18.||Arrange the following elements in increasing order of their atom's size. Li, Rb, K, Cs|