Practice The Ever-Evolving Atom: A Historical Perspective - 2.1 | Chapter 2: The Building Blocks of Matter: Atoms, Elements, and the Periodic Table | IB Grade 9 Chemistry
K12 Students

Academics

AI-Powered learning for Grades 8–12, aligned with major Indian and international curricula.

Professionals

Professional Courses

Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.

Games

Interactive Games

Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

Who proposed the concept of 'atomos'?

💡 Hint: Think of ancient Greek philosophers.

Question 2

Easy

What does Dalton's atomic theory state about atoms in reactions?

💡 Hint: Consider the conservation of mass.

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

Who is credited with the first atomic theory?

  • Democritus
  • Dalton
  • Thomson

💡 Hint: Think of the early 19th century.

Question 2

True or False: Electrons were discovered before the nucleus.

  • True
  • False

💡 Hint: Consider the timeline of discoveries.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

Analyze how the shift from Dalton's model to Rutherford's model changed the course of atomic theory.

💡 Hint: Consider the implications of internal structures on chemical behavior.

Question 2

Evaluate the importance of quantized energy levels introduced by Bohr and how it impacted our understanding of electron behavior.

💡 Hint: Think about how energy absorption and emission relate to light and color.

Challenge and get performance evaluation