IB Chemistry SL S1.3 Electron configurations questions

Exam-style multiple choice and written questions with full markschemes. Check multiple choice answers straight away, or type, photograph or draw a written answer and get it marked.

Type
Multiple choiceWritten
Difficulty
EasyMediumHard

Question 1

Multiple choiceMedium1 mark

A gaseous element is excited, and its emitted light is observed as separate violet and red lines. Which interpretation accounts for both the lines and their colours?

Show answer and explanation

Answer: C. Each line corresponds to a photon emitted as an excited electron returns to a lower energy level. Violet light has a shorter wavelength and higher frequency than red light, so violet photons have greater energy.

A: confuses emission with absorption, which occurs as electrons move to higher energy levels.
B: identifies emission correctly but reverses the relative photon energies of red and violet light.
D: reverses the electron transition direction; emission occurs when electrons move to lower energy levels.

Remember: shorter wavelength means higher frequency and greater photon energy.

Question 2

Paper 2Medium5 marks

Figure 1 shows the structural formula of bromomethane. Use the periodic table where needed.

CHHHBrA
(a)

Identify the element labelled A and state the period in which it is found.

[2]
(b)

Calculate the maximum number of electrons in the main energy level corresponding to the period of A.

[1]
(c)

Using your answer to (b), determine how many more electrons this main energy level can hold than the main energy level corresponding to carbon in Figure 1.

[2]

The best questions are still waiting

Unlock every question in this topic, then type, photograph or draw your answer and have it marked against the markscheme. Find out where you are dropping marks.

Unlock all questionsCompare Student and Student Plus