Topic 1 - Exam-style questions

Question 1

The total number of electrons in all the occupied p orbitals in a chloride ion, Cl-1, is:

Answer 1

12

Question 2

Which of the following sets of data
showing the first four ionisation energies of four elements is most likely to be boron:
- 1086, 2353, 4621, 6223
- 900, 1757, 14849, 21007
- 801, 2427, 3660, 25026
- 578, 1817, 2745, 11578

Answer 2

801, 2427, 3660, 25026

Question 3

The first successive ionisation energies for an element J, in KJ mol-1, are:
- 1st = 738
- 2nd = 1450
- 3rd = 7733
- 4th = 10543
- 5th = 13630
The formula of the compound of chlorine with element J is:
a) JCl
b) JCl2
c) JCl3
d) J2Cl3

Answer 3

b) JCl2

Question 4

For which of the following pairs of elements does the second have a higher1st ionizations energy than the first
a) Mg, Al
b) N, O
c) Ne, Na
d) K, Na

Answer 4

b) N, O

Question 5

In which of the cases would a cation be the most polarised
a) radius = small, charge = small
b) radius = small, charge = large
c) radius = large, charge = small
d) radius = large, charge = large

Answer 5

b) radius = small, charge = large