Name: _________________________________Block #: ___Date: ______________
Worksheet: Periodic Trends
1. ATOMIC RADIUS: For each of the following sets of atoms, rank the atoms from
smallest to largest atomic radius.
a. Li, C, F
c. Ge, P, O
b. Li, Na, K
d. C, N, Al
2. IONIC RADIUS: For each of the following sets of ions, rank them from smallest
to largest ionic radius.
a. Mg2+, Si4-, S2-
c. F-, Cl-, Br-
b. Mg2+, Ca2+, Ba2+
d. Ba2+, Cu2+, Zn2+
3. IONIZATION ENERGY: For each of the following sets of atoms, rank them from
lowest to highest ionization energy.
a. Mg, Si, S
c. F, Cl, Br
b. Mg, Ca, Ba
d. Ba, Cu, Ne
4. ELECTRONEGATIVITY: For each of the following sets of atoms, rank them from
lowest to highest electronegativity.
a. Li, C, N
c. Si, P, O
b. C, O, Ne
d. K, Mg, P
5.
Rank the following elements by increasing atomic radius: carbon, aluminum,
oxygen, potassium.
6.
Rank the following elements by increasing electronegativity: sulfur, oxygen,
neon, aluminum.
7.
What is the difference between electron affinity and ionization energy?
8.
Why does fluorine have a higher ionization energy than iodine?
9.
Why do elements in the same family generally have similar properties?
10. Which group tends to form 1+ ions?__________________________________
11. Which group tends to form 2+ ions?__________________________________
12. Which group tends to form 1- ions?__________________________________
13. Which group tends not to form ions or react?___________________________
14. Locate the alkali metals, alkaline earth metals, halogens, noble gases, actinides,
lanthanides, main group elements, semimetals (metalloids), transition metals and inner
transition metals on the periodic table.
15. What repeating pattern is noticeable regarding the ionization energies of different
elements? How does the periodic table account for this pattern?
16. Explain the pattern for electronegativity and atomic size from the periodic table.
Based on the concept of periodic trends, answer the following questions for
these atoms: Li, Be, Mg, Na. Be able to defend your answers.
17. Which element has the highest first ionization energy?___________________
18. Which element has the lowest electronegativity?________________________
19. Which element has the least metallic character?_________________________
20. Which element is the largest atom?__________________________________
Based on the concept of periodic trends, answer the following questions for
these atoms: P, S, Cl, F. Be able to defend your answers.
21. Which element has the highest first ionization energy?___________________
22. Which element has the highest electronegativity?_______________________
23. Which element has the least metallic character?_________________________
24. Which element has the largest ion?__________________________________
Based on the concept of periodic trends, answer the following questions for
these atoms: Au, Zn, S, Si. Be able to defend your answers.
25. Which element has the highest first ionization energy?___________________
26. Which element has the highest electronegativity?_______________________
27. Which element has the most metallic character?_________________________
29. Which element has the largest atom?_________________________________
29. Identify the largest and smallest atom or ion in each set:
a. H+, He
ion of Sr
b. K+, Ca2+, Ar, Cl-, S2-
c. ion of F, ion of Cl, ion of Ba,
30. Write the formula with charge of the ions formed by each of these elements:
H_____ Li_____ N_____ Cl_____ Sr____ Xe____
S____ Cs____ P_____ Ba_____Br____ Se____