Practice - Mass Number (A)
Practice Questions
Test your understanding with targeted questions
What is the mass number of an element with 8 protons and 5 neutrons?
💡 Hint: Remember to add the number of protons and neutrons together.
If an oxygen atom has 8 protons, what would its atomic number be?
💡 Hint: The atomic number is the number of protons.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the mass number represent?
💡 Hint: Consider what contributes to an atom's mass.
Isotopes of an element have the same number of which subatomic particle?
💡 Hint: Think about how elements are identified.
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Challenge Problems
Push your limits with advanced challenges
An isotope has a mass number of 30 and atomic number of 14. How many neutrons does it contain? Provide reasoning for your solution.
💡 Hint: Remember the formula A = Z + N.
Explain how changing the number of neutrons affects the stability of an isotope using Carbon-14 as an example.
💡 Hint: Consider the balance between protons and neutrons in terms of atomic stability.
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Reference links
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