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Mass Number, Atomic Number And Isotopes (GCSE Physics)

The following is a GCSE Physics test covering 'Mass Number, Atomic Number And Isotopes' from the broader topic Atomic Structure. The test is geared towards the AQA exam board style syllabus.
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Below a typical questions that will be covered in this test. You final score will be logged on your account

An atom has atomic number 8 and mass number 16. How many neutrons does it have?
How many neutrons are in ²5Mg (magnesium-25)?
Carbon-14 and carbon-12 are isotopes. Which statement is true?
A neutral atom of an element has 15 protons and 16 neutrons. What is its mass number and atomic number?
Which of these gives the mass number (A) of an atom?
Why do isotopes of the same element have similar chemical behaviour?
An atom has 17 protons and mass number 35. What is the chemical symbol and number of neutrons?
An isotope is best defined as:
Two isotopes of the same element have different physical properties because they:
If an atom loses an electron it becomes:
An ion has 20 protons and 18 electrons. What is its charge and which element is it?