Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
How many elements were known in the year 1800?
💡 Hint: Think about the early discoveries in chemistry.
Question 2
Easy
What is the Periodic Table?
💡 Hint: Consider how elements are grouped.
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 year had only 31 elements discovered?
- 1800
- 1900
- 1865
💡 Hint: Think about early discoveries.
Question 2
Is the Periodic Table an effective tool for organizing elements?
- True
- False
💡 Hint: Reflect on its usefulness in education and research.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Analyze how the discovery of gallium and germanium supported Mendeleev's predictions about undiscovered elements.
💡 Hint: Review how Mendeleev categorized elements.
Question 2
Evaluate the influence of periodic trends on modern chemistry advancements.
💡 Hint: Consider how trends guide experimental research.
Challenge and get performance evaluation