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Tutor HuntTest QuestionsChemistry QuestionsYear 10 Chemistry Questions

 

Size And Mass Of Atoms (GCSE Chemistry)

The following is a GCSE Chemistry test covering 'Size And Mass Of Atoms' from the broader topic Atomic Structure And The Periodic Table. The test is geared towards the AQA exam board style syllabus.
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A sample contains 25% isotope A (mass 30) and 75% isotope B (mass 32). What is the approximate Ar of the element?
Why do ions of an element have a different mass to the neutral atom?
An atom of carbon-12 has 6 protons and 6 neutrons. What is the mass number and what does it represent?
Which particle contributes almost all of an atom’s mass?
A sample contains 90.00% isotope A (mass 35) and 10.00% isotope B (mass 37). What is the relative atomic mass (Ar) of the element (to two decimal places)?
What is the atomic mass unit (1 u) defined approximately as?
Which of these statements correctly describes how the relative atomic mass (Ar) of an element is calculated when the element has two naturally occurring isotopes?
How many protons, neutrons and electrons are present in a neutral atom of sulphur-34?
Which of these best explains why atomic radii generally increase going down a group in the periodic table?
What does a mass spectrometer measure directly to determine the relative atomic mass of an element?
Which of these shows the correct relationship between mass number (A), proton number (Z) and neutron number (N)?