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
What is the formula for sodium chloride?
💡 Hint: Think of the charges of sodium and chlorine.
Question 2
Easy
How many hydrogen atoms are in a water molecule (H₂O)?
💡 Hint: Look at the subscript after H.
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 charge of sodium when it forms an ion?
- -1
- +1
- 0
💡 Hint: Think about how sodium behaves in chemical reactions.
Question 2
A covalent compound is formed when:
- True
- False
💡 Hint: Remember the sharing aspect of covalent bonds.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Write the formula for potassium phosphate, given potassium has a +1 charge and phosphate (PO₄) has a -3 charge.
💡 Hint: Use the criss-cross method for balancing the charges.
Question 2
Count the number of atoms in (NH₄)₃PO₄.
💡 Hint: Remember to multiply the ammonium group's components by 3.
Challenge and get performance evaluation