30 May 2021
What is a molecule?
A molecule is a particularly small group of non-metal atoms that are held together by covalent bond
15 Mar 2021
Are ionic compounds soluble in water?
Chemistry is messy: most but not all ionic compounds are soluble in water
13 Mar 2021
Gas collection: water displacement, upward delivery & downward delivery
The three methods of collecting gases by their physical properties
13 Mar 2021
How to find the cation and anion in a compound?
What are ionic compounds and the ions they contain?
17 Jan 2021
Differences between crystallisation and evaporation to dryness
Crystallisation and evaporation to dryness are two different methods to separate different solutes from their solution.
30 Dec 2020
Transition elements: What makes Tanah Merah so merah?
Find out the transition element that dyes the soil in Tanah Merah brick red and gave the place its name.
18 Dec 2020
Noble gases: The high and mighty helium
Helium was discovered on the sun before it was found on earth. What about it as a noble gas makes it so good at hiding?
15 Dec 2020
Mixtures & pure substances: The mystery of air
For most part of human history, scientists could not correctly tell whether air is a single substance or a mixture.
10 Dec 2020
Paper chromatography
Paper chromatography is a simple yet powerful detective tool to separate and analyse the substances in a mixture.
5 Dec 2020
Simple distillation vs fractional distillation
A solution of two miscible liquids is tricky to separate. How can we solve it with fractional distillation, a modified version of simple…
3 Dec 2020
What are isotopes?
Atoms of the same element may not be identical. The different forms of an element are called isotopes.
3 Dec 2020
Distillation: An ancient technique to separate liquid
Distillation has been used to separate and purify liquid since more than 2000 years ago.
23 Nov 2020
Proton: Getting particular about identifying elements
The proton is the subatomic particle that defines the chemical identity of an element.
18 Nov 2020
Electron: What we know and can never know
The electron is the first subatomic particle to be discovered, turning chemistry on its head more than a century ago.
13 Nov 2020
Carbon dioxide & other acidic oxides
Some oxides can behave like an acid and neutralise bases. How do you identify them?
9 Nov 2020
What is atomic structure?
The atom is not a featureless ball. It consists subatomic particles arranged in a mind-boggling way.
16 Sep 2020
Kinetic particle theory
The kinetic particle theory explains the visible with the invisible.
8 Sep 2020
Global warning: Global warming
We can all play a part to clear the air of greenhouse gases to slow global warming.