The starter and exit quiz of the lesson “Relative formula mass”, from the unit “Atomic structure and the periodic table” (Year 10 Science) by Oak National Academy.
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Oak National Academy
12 questions
Which statement accurately describes the atomic number of any given element?
True or false: The atomic mass number of an element is listed on the periodic table.
Match each term with its correct definition.
Isotopes of the same element have the same atomic number because they contain the same number of protons. However, they have different relative atomic masses due to varying numbers of ___.
If an element has an atomic number of 8 and an average atomic mass of 16, which element is it?
The ___ number is always a whole number because it represents the fixed number of protons in the nucleus of an atom.
What does the relative atomic mass (RAM or Ar) compare the mean mass of an atom to?
Order the following steps to calculate the RFM of a compound correctly. Start withe periodic table.
What is the relative formula mass (RFM or Mr) of water (H₂O)?
Calculate the RFM of carbon dioxide (CO₂)
To calculate the percentage by mass of an element in a compound, you need:
What is the percentage by mass of hydrogen in water (H₂O)? Give your answer to four significant figures.
