DP Chemistry (first assessment 2025)
Question 20N.1A.SL.TZ0.6
| Date | November 2020 | Marks available | [Maximum mark: 1] | Reference code | 20N.1A.SL.TZ0.6 |
| Level | SL | Paper | 1A | Time zone | TZ0 |
| Command term | State | Question number | 6 | Adapted from | N/A |
6.
[Maximum mark: 1]
20N.1A.SL.TZ0.6
What is the correct trend going down groups 1 and 17?
A. Melting points increase
B. Boiling points decrease
C. Electronegativities increase
D. Ionization energies decrease
[1]
Markscheme
D
Examiners report
Most candidates selected ionization energy as the property that decreases down both group 1 and 17.
Syllabus sections
Structure 3. Classification of matter » Structure 3.1—The periodic table: Classification of elements » Structure 3.1.4—Trends in properties of elements down a group include the increasing metallic character of group 1 elements and decreasing non-metallic character of group 17 elements. Describe and explain the reactions of group 1 metals with water, and of group 17 elements with halide ions.