Periodic Table Trends Use the periodic table and your knowledge of periodic trends to answer the following questions. Which atom in each pair has the larger atomic radius? _K_ 1. Li or K _Ni_ 2. Ca or Ni _Ga_ 3.Ga or B _C__ 4. O or C _Br_ 5. Cl or Br _Ba_ 6. Be or Ba _Si__ 7. Si or S _Au_ 8. Fe or Au Which ion in each pair has the smaller atomic radius? _K+__ 9. K+ or 02- _Ba2+ 10. Ba 2+ or I- _Al3+_ 11. Al3+ or P3- _K+__ 12. K+ or Cs+ _Fe3+_ 13. Fe2+ or Fe3+ _F-_ 14. F- or S2- Which atom or ion in each pair has the larger ionization energy? _O_ 15. Na or O _Be_ 16. Be or Ba _F_ 17. Ar or F _Cu_ 18. Cu or Ra _Ne_ 19. I or Ne _V_ 20. K or V _Ca_ 21. Ca or Fr _Se_ 22. W or Se

1. Chlorine, selenium, and bromine are located near each other on the periodic table. Which of these elements is (a) the smallest ion? (b) the atom with the highest ionization energy?

a) Cl b) Cl 2. Phosphorus, sulfur and selenium are located near each other on the periodic table.

Which of these elements is (a) the largest atom? (b) the atom with the highest ionization energy?

a) Se b) S 3. Scandium, yttrium, and lanthanum are located near each other in the periodic table.

Which of these elements is (a) the largest atom? (b) the atom with the smallest ionization energy?

a) La b) La 4. (a) Which of the following atoms is smallest: vanadium, chromium, or tungsten?

(b) Which of these atoms has the highest ionization energy? a) Cr

b) Cr

5. (a) Which of the following atoms is smallest: nitrogen, phosphorus, or arsenic? (b) Which of these atoms has the smallest ionization energy?

a) N b) As

6. Which of the following is the largest: a potassium atom, a potassium ion with a charge or 1+, or a rubidium atom?

Rb

7. Which of the following is the largest: a chlorine atom, a chlorine ion with a charge of 1-, or a bromine atom?

Cl- 8. Which of the following is the smallest: a lithium atom, a lithium ion with a charge of

1+, or a sodium atom? Li+

9. Which of the following is the largest: a tellurium ion with the charge of 2-, an iodine

ion with the charge of 1- or a xenon atom? Te2-

10. Aluminum, silicon, and phosphorus are located near each other in the periodic table.

Which of these elements is (a) the largest atom? (b) the atom with the highest ionization energy?

a) Al b) P