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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does the atomic number represent?
💡 Hint: Think about what defines an element.
Question 2
Easy
How do isotopes differ from one another?
💡 Hint: Consider the components of the nucleus.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the atomic number of an element that has 11 protons?
- 10
- 11
- 12
💡 Hint: It's the same as the number of protons.
Question 2
True or False: Isotopes of an element always have the same mass number.
- True
- False
💡 Hint: Focus on what makes isotopes different.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A neutral element has an atomic number of 15 and a mass number of 31. How many neutrons does it have?
💡 Hint: Remember the formula for mass number.
Question 2
If an isotope of iodine has a mass number of 127 and the atomic number is 53, how many neutrons does it have?
💡 Hint: Use the same subtraction method as before.
Challenge and get performance evaluation