DP Chemistry (first assessment 2025)
Question 19M.1A.SL.TZ1.7
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.1A.SL.TZ1.7 |
| Level | SL | Paper | 1A | Time zone | TZ1 |
| Command term | Question number | 7 | Adapted from | N/A |
7.
[Maximum mark: 1]
19M.1A.SL.TZ1.7
Which describes an atom of bismuth, Bi (Z = 83)?
[1]
Markscheme
C
Examiners report
A well answered question regarding finding principal energy level and valence electrons from position on the periodic table.
Syllabus sections
Structure 3. Classification of matter » Structure 3.1—The periodic table: Classification of elements » Structure 3.1.2—The period number shows the outer energy level that is occupied by electrons. Elements in a group have a common number of valence electrons. Deduce the electron configuration of an atom up to Z = 36 from the element’s position in the periodic table and vice versa.
Structure 1. Models of the particulate nature of matter » Structure 1.3—Electron configurations » Structure 1.3.5—Each orbital has a defined energy state for a given electron configuration and chemical environment, and can hold two electrons of opposite spin. Sublevels contain a fixed number of orbitals, regions of space where there is a high probability of finding an electron. Apply the Aufbau principle, Hund’s rule and the Pauli exclusion principle to deduce electron configurations for atoms and ions up to Z = 36.