Structured questions and short answer questions
Structured questions with one to four marks usually start with command words. If a question starts with the command word 'state', 'give', 'name' or 'write down', it needs a short answer only. This type of question can often be answered with one word or phrase.
It is important to state, give, name or write down the number of things that the question asks for. If you write down fewer, you cannot get all the marks. If you write down more, and one is wrong, you might lose a mark.
Some questions start with the command words 'describe', 'explain' or 'compare'. These are often worth two or more marks:
- Describe means you should recall facts, events or processes accurately. You might need to give an account of what something looked like, or what happened.
- Explain means you need to make something clear, or state the reasons for something happening. The points in the answer must be linked together. The answer must not be a list of reasons. All the points must be relevant to the question.
- Compare means you need to describe similarities and differences between things. If you are asked to compare X and Y, write down something about X and something about Y and give a comparison. Do not just write about X only or Y only.
More complex structured questions will be worth three or four marks. They include questions with complex descriptions and explanations and questions in which you need to compare things.
Some of the answers are shown here as bullet points. This is to show clearly how a mark can be obtained. However, do not use bullet points in your answers - the points must be linked together logically.
This page contains AQA material which is reproduced by permission of AQA.
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Sample question 1 - Foundation
Question
Lithium, sodium and potassium are all in group 1 of the modern periodic table.
Explain why. [2 marks]
All have one electron in the outer shell (highest energy level) [1].
They have similar properties or react in the same way [1].
Sample question 2 - Foundation
The table shows information about some elements.
Element | Melting point in 掳C | Boiling point in 掳C |
Fluorine | -202 | -188 |
Chlorine | -101 | -35 |
Bromine | -7 | 59 |
Iodine | 114 | 184 |
Astatine |
Element | Fluorine |
---|---|
Melting point in 掳C | -202 |
Boiling point in 掳C | -188 |
Element | Chlorine |
---|---|
Melting point in 掳C | -101 |
Boiling point in 掳C | -35 |
Element | Bromine |
---|---|
Melting point in 掳C | -7 |
Boiling point in 掳C | 59 |
Element | Iodine |
---|---|
Melting point in 掳C | 114 |
Boiling point in 掳C | 184 |
Element | Astatine |
---|---|
Melting point in 掳C | |
Boiling point in 掳C |
Question
a) Describe the trend in melting point from fluorine to astatine. [1 mark]
b) Estimate the boiling point of astatine. [1 mark]
Use the table to help you.
c) Room temperature is 20掳C.
Which element in the table is liquid at room temperature? [1 mark]
a) The melting point increases [1].
b) 337掳C (allow an answer in the range 278掳C to 337掳C) [1].
c) Bromine [1].
Sample question 3 - Higher
Question
The elements in Group 1 of the periodic table are called the alkali metals.
a) Why are they called the alkali metals? [2 marks]
b) Explain the increase in reactivity of elements further down the group. [4 marks]
a) Because they form hydroxides [1] that give alkaline solutions (in water) [1].
b) The atoms have more electron shells (as move down the group) [1].
The electron in the outer shell is further away from the nucleus [1] which reduces the attraction to the nucleus [1].
So the electron is lost more easily from the atom [1].
Sample question 4 - Higher
Question
Explain the arrangement of the first 20 elements in today's periodic table.
You should answer in terms of atomic structure. [2 marks]
Arranged in order of atomic/proton number [1].
Elements in the same group have the same number of electrons in the outer shell [1].