What's the link between valency and group number?
How does group number predict bonding?
Gravity basics
Why does the Moon not fall onto Earth if gravity attracts it?
Why do we write chemical equations?
Why can't we just describe reactions in words?
Acceleration due to gravity
Does g = 9.8 m/s² everywhere on Earth?
What are the signs that a chemical reaction has occurred?
How can you “see” chemistry happening?
Weightlessness in orbit
Why do astronauts feel weightless inside the ISS?
What's the difference between balanced and unbalanced equations?
Why do teachers stress balancing?
Why do we add HCl to zinc in the lab?
What's the reaction behind it?
Falling objects
If we drop a hammer and a feather on the Moon, which lands first?
Why does an iron nail turn brown in copper sulfate solution?
Is this magic or chemistry?
Escape velocity
What speed must a rocket reach to leave Earth's gravity?
Why do food packets have “silica gel” inside?
What's the chemistry behind it?
Artificial gravity
Can we create gravity in a spaceship?
Why does limewater turn milky when CO₂ is passed?
What forms the white color?
Study Materials
Access comprehensive notes, guides, and resources to excel in your studies