Classification of Elements and Periodicity in Properties

Topics in this chapter

• Periodic Classification and Block Position
• Atomic, Ionic Size and Shielding
• Ionization and Electron Gain Enthalpy
• Electronegativity, Metallic Character and Anomalies
• Oxides and Hydration Enthalpy Trends

Cheat sheet

Practice questions

1. Question 1Q-823AEE

   The correct order of the second ionization enthalpy of carbon, nitrogen, oxygen, and fluorine is:

   1. A.C > N > O > F
   2. B.O > N > F > C
   3. C.F > O > N > C
   4. D.N > C > O > F
   See the answer and solution
2. Question 2Q-45C570

   Which of the following species has the largest radius?

   1. A.Cl^-
   2. B.Ar
   3. C.K^+
   4. D.Ca^{2+}
   See the answer and solution
3. Question 3Q-98004E

   The general outer electronic configuration of $d$-block elements is represented as:

   1. A.(n-1)d^{1-10} ns^{1-2}
   2. B.(n-1)d^{0-10} ns^2
   3. C.nd^{1-10} (n-1)s^2
   4. D.(n-1)d^{1-10} ns^0
   See the answer and solution
4. Question 4Q-10F413

   Which of the following pairs has both members belonging to the same period of the periodic table?

   1. A.Na, Ca
   2. B.Na, Cl
   3. C.Mg, Cl
   4. D.Cl, Br
   See the answer and solution
5. Question 5Q-5BD3A8

   The correct order of electronegativity values on the Pauling scale for the elements F, Cl, Br, and I is:

   1. A.F > Cl > Br > I
   2. B.F > Cl > I > Br
   3. C.Cl > F > Br > I
   4. D.F > Br > Cl > I
   See the answer and solution