Chemistry Around Us
Scientists
Lab & Safety
Periodic Table
Fun Chemistry
100
This gas makes up about 78% of Earth's atmosphere.
Nitrogen
100
Who developed the periodic table?
Dmitri Mendeleev
100
What piece of equipment protects your eyes?
Safety goggles
100
This element has the symbol O.
Oxygen
100
This element is the lightest in the periodic table.
Hydrogen
200
The chemical formula for dihydrogen oxide is...
H₂O
200
Which scientist proposed the atomic model with electrons orbiting the nucleus?
Niels Bohr
200
Before starting any experiment, you should always read these carefully.
Instructions or Procedure
200
How many groups are in the modern periodic table?
18
200
Which element gives fireworks their bright red colour?
Strontium
300
Which element is found inside pencils?
Carbon (graphite)
300
Who discovered radioactivity?
Henri Becquerel
300
If acid splashes on your skin, the first thing you should do is...
Rinse with plenty of water.
300
Which group contains the noble gases?
Group 18
300
Dry ice is the solid form of this substance.
Carbon dioxide
400
Which metal is commonly used to make drink cans?
Aluminium
400
Which scientist won two Nobel Prizes in two different sciences?
Marie Skłodowska-Curie
400
Which instrument measures volume most accurately: beaker, graduated cylinder, or conical flask?
Graduated cylinder.
400
Which element has the chemical symbol Fe?
Iron
400
Which metal is liquid at room temperature?
Mercury
500
What household chemical is usually added to swimming pools to kill bacteria?
Chlorine
500
Who is often called the "father of modern chemistry"?
Antoine Lavoisier
500
Name one thing you should NEVER do in a chemistry laboratory.
Eat or drink, taste chemicals, run, pipette by mouth, etc.
500
Elements in the same group have the same number of...
Valence electrons
500
What is the only letter that does NOT appear in any current chemical symbol?
J