Question 19M.3.hl.TZ1.1b(iii)
| Date | May 2019 | Marks available | [Maximum mark: 2] | Reference code | 19M.3.hl.TZ1.1b(iii) |
| Level | hl | Paper | 3 | Time zone | TZ1 |
| Command term | Compare | Question number | b(iii) | Adapted from | N/A |
Physical properties of elements vary according to atomic number. Sections 6 to 9 of the data
booklet list some of these properties.
Melting points and boiling points of elements 1 to 95
Compare the ease of oxidation of s-block and d-block metals to their melting points and densities. Use section 25 of the data booklet.
[2]
Alternative 1:
«metals with» low densities oxidize easier [✔]
«metals with» low melting points oxidize easier [✔]
Alternative 2:
in s-block «metals with» high densities oxidize easier
OR
in s-block «metals with» low melting points oxidize easier [✔]
in d-block «metals with» low densities oxidize easier
OR
in d-block «metals with» low melting points oxidize easier [✔]
Note: Award [1 max] for “s-block metals more easily oxidized” OR “s-block metals have lower melting points” OR “s-block metals have lower densities”.
Accept “have greater activity” for “oxidize easier”.
Most candidates scored at least 1 mark for comparing the s-block and d-block metals and most drew a line with a negative slope.
