Test
Inside the atom
This 9th-grade classroom material helps students explore the history and structure of atomic models through question-based exercises. Students practice identifying scientists, understanding subatomic particles, and sequencing models by answering multiple-choice and fill-in-the-blank questions.
By Edform · Chemistry · Grade 9 · Published Oct 15, 2026 · New
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Questions
- Which scientist is credited with discovering the electron, leading to the 'plum pudding' model of the atom?
- Which of the following statements about subatomic particles are correct?
- Put these atomic models in the order they were proposed, from earliest to latest.
- Fill in the blanks with the correct terms: The atomic number of an element is equal to the number of _ in its nucleus, while the mass number is the sum of protons and _.
- Sort the following as either 'Isotopes of Carbon' or 'Not Isotopes of Carbon'.
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