6.3. Trends in the Periodic Table http://www.ck12.org
e. F−- Which configuration corresponds to an atom with a larger radius: 1s^2 2s^2 2p^1 or 1s^2 2s^2 2p^6? Identify these
elements. - Which configuration corresponds to an atom with a larger radius: 1s^2 2s^2 2p^6 or 1s^2 2s^2 2p^6 3s^2 3p^6? Identify
these elements. - Using only the periodic table, arrange each set of atoms in order of increasing atomic radius:
a. Rb, Cs, Li
b. B, Li, F
c. Cl, F, Ba
d. Rb, Be, K
e. Cl, Al, Ba - Arrange each set of atoms and ions in order of increasing radius:
a. O, O−, O^2 −
b. Li+, Li, Be^2 +
c. Na+, Mg^2 +, Al^3 +
d. F−, Br−, O^2 −
e. Cs+, Ba^2 +, Al^3 + - Arrange each set of atoms in order of increasing electron affinity (least negative to most negative):
a. Li, K, F
b. F, O, N
c. S, Cl, Ca
d. I, Ba, Tl
e. Br, Al, I - Pick the largest ionization energy for each set:
a. IE 1 (Li), IE 2 (Li), IE 1 (Be)
b. IE 2 (Cs), IE 1 (Rb), IE 7 (Na)
c. IE 1 (Y), IE 1 (Zr), IE 3 (Zr)
Further Reading / Supplemental Links
- Barber, R. C., Karol, P. J., Nakahara, H., Vardaci, E., Vogt, E. W. (2011). Discovery of the elements with
atomic numbers greater than or equal to 113 (IUPAC Technical Report). Pure and Applied Chemistry, 83(7),
1485 - 1498. - Bonifácio, V. D. B. (2012). QR-Coded Audio Periodic Table of the Elements: A Mobile-Learning Tool.
Journal of Chemical Education. doi: 10.1021/ed200541e - Hsu, D. D. (2012). Chemicool Dictionary, from http://www.chemicool.com/dictionary.html
- Gorin, G. (1996). Mendeleev and Moseley: The Principal Discoverers of the Periodic Law. Journal of
Chemical Education, 73(6), 490. doi: 10.1021/ed073p490 - Jensen, W. B. (2005). The Origin of the 18-Electron Rule. Journal of Chemical Education, 82(1), 28. doi:
10.1021/ed082p28 - "Law of octaves." (2012) Encyclopædia Britannica: Encyclopædia Britannica Inc.
- Levi, P. (1984). The Periodic Table. New York: Pantheon Books.
- Trimble, R. F. (1981). Mendeleev’s discovery of the periodic law. Journal of Chemical Education, 58(1), 28.
doi: 10.1021/ed058p28