Lesson 5.1.1.6
5.1.1.6 Relative atomic mass Quiz: AQA Combined Science, Unit 8
20 questions
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Lesson 5.1.1.6, Relative atomic mass: 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 8: Atomic structure and the periodic table, written with Revision Ninja.
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The 20 questions
-
What does the relative atomic mass of an element account for?
- Total ion charge
- Isotope abundances
- Nuclear volume
- Electron shells
-
Which data is needed to calculate relative atomic mass?
- Radius and volume
- Shells and energy
- Protons and electrons
- Masses and abundances
-
Which symbol is used for relative atomic mass?
- A
- Mr
- Z
- Ar
-
Why is the relative atomic mass of chlorine not a whole number?
- It is unstable
- It has extra neutrons
- It has a charge
- It is an average
-
What are the units for relative atomic mass?
- g
- kg
- None
- amu
-
Percentage abundances of isotopes are used to calculate what?
- Mass number
- Electron number
- Relative atomic mass
- Atomic number
-
For an element with two isotopes, where does its relative atomic mass lie?
- Above both masses
- Below both masses
- At zero
- Between their masses
-
A mass number is always:
- Measured in grams
- A whole number
- A decimal value
- An average value
-
A sample of chlorine has 75% chlorine-35 and 25% chlorine-37. What is its relative atomic mass?
- 36.0
- 35.0
- 35.5
- 37.0
-
An element has two isotopes, of mass 10 (50%) and mass 12 (50%). What is its relative atomic mass?
- 12.0
- 11.0
- 22.0
- 10.0
-
Boron has 20% boron-10 and 80% boron-11. What is its relative atomic mass to one decimal place?
- 10.8
- 10.0
- 10.2
- 11.0
-
An element has isotopes of mass 20 (90%) and 22 (10%). What is its relative atomic mass?
- 22.0
- 20.0
- 21.0
- 20.2
-
An isotope of mass 63 is 69% abundant and an isotope of mass 65 is 31% abundant. What is the relative atomic mass to one decimal place?
- 63.6
- 63.0
- 65.0
- 64.0
-
An element has isotopes of mass 40 (96%), 42 (2%) and 44 (2%). What is its relative atomic mass to one decimal place?
- 42.0
- 41.3
- 40.1
- 40.0
-
An element has isotopes of mass 7 (92.5%) and 6 (7.5%). What is its relative atomic mass to one decimal place?
- 6.9
- 7.0
- 6.0
- 6.5
-
An element is 99% isotope of mass 19 and 1% isotope of mass 21. Its relative atomic mass is closest to:
- 20.0
- 19.0
- 18.0
- 21.0
-
Why does relative atomic mass differ from any single isotope mass number?
- It is weighted
- It ignores neutrons
- It is rounded up
- It measures volume
-
Element Z has a relative atomic mass of 20.0 from isotopes of mass 19 and 21 only. What is the percentage abundance of the mass-21 isotope?
- 50%
- 40%
- 75%
- 25%
-
An element has isotopes of mass 35 and 37 and a relative atomic mass of 35.4. What percentage of atoms are mass 37?
- 20%
- 40%
- 60%
- 80%
-
A sample has 25% of an isotope of mass 49 and 75% of an isotope of mass 51, and no others. What is its relative atomic mass?
- 50.0
- 50.5
- 49.5
- 51.0
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