Practice - What is an Atom?
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Practice Questions
Test your understanding with targeted questions
What is the definition of an atom?
💡 Hint: Think about the basic unit of something.
Who discovered the electron?
💡 Hint: Remember his famous cathode ray experiment.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the charge of an electron?
💡 Hint: Think about the opposite charge to protons.
True or False: The atomic number equals the number of neutrons.
💡 Hint: Remember the definition of atomic number.
2 more questions available
Challenge Problems
Push your limits with advanced challenges
A neutral atom has 10 protons and 10 electrons. If it gains 2 electrons, what is its new charge and how does that affect its chemical behavior?
💡 Hint: Think about how gaining electrons affects overall charge.
If you find an element with 6 protons and 8 neutrons, what is its mass number and how many isotopes could this element potentially have?
💡 Hint: Consider how neutrons vary among isotopes.
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