3 - Atomic Number, Mass Number, and Isotopes
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Practice Questions
Test your understanding with targeted questions
How many protons does an atom of neon have?
💡 Hint: Look up the atomic number of neon.
What is the mass number of a carbon atom that has 6 protons and 6 neutrons?
💡 Hint: Add the number of protons and neutrons.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does the atomic number represent?
💡 Hint: It's unique to each element.
Mass number is equal to:
💡 Hint: Think about the definition of mass number.
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Challenge Problems
Push your limits with advanced challenges
An isotope of oxygen has a mass number of 18 and an atomic number of 8. How many neutrons does this isotope have?
💡 Hint: Remember that the mass number is the sum of protons and neutrons.
If an element has 11 protons and 12 neutrons, identify its atomic number and mass number.
💡 Hint: Atomic number equals the number of protons.
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