Element identification
Periodic table
Trivia
Chemical formulas
Science facts
100
What is the name of the chemical element with atomic number 1?
Hydrogen
100
What does this number mean? 
It's the atomic number.
100
Which of these elements is a famous poison?
a) Copper
b) Arsenic
c) Magnesium
b) Arsenic
100
What is the chemical formula of carbon dioxide?
CO2
100
What is the most common gas in the Earth's atmosphere?
Nitrogen
200
Which element has the symbol Ar?
Argon
200
What do you call these elements?
He, Ne, Ar, Kr, Xe, Rn
Noble gases
200
Which gaseous element increases the pitch of a voice when inhaled?
Helium
200
How many atoms of H are in water?
Two
200
What is the lightest element?
Hydrogen
300
Which element has the atomic number 13?
Aluminium
300
How many liquids (at room temperature) are on the periodic table?
Two (Mercury and Bromine)
300
The US five-cent coin takes its nickname from what element?
Nickel
300
What is the chemical formula of hydrogen peroxide?
a) H2O2
b) H2O
c) HO2
a) H2O2
300
Diamonds are made of what element?
Carbon
400
Which element uses the symbol K?
Potassium
400
What are these elements known as?
Lanthanides
400
The elements Radium and Polonium were discovered by which scientist?
Marie Curie
400
Chemical formula of table salt.
NaCl
400
Every atom of an element has the same number of...
a) neutrons
b) protons
c) electrons
b) protons
500
Which element uses the symbol Hg?
Mercury
500
What are these elements known as?
Actinides
500
Which gaseous element fills red tubular signs, used in advertising displays?
a) Oxygen
b) Nitrogen
c) Neon
c) Neon
500
Emerald is a mineral of which element?
Beryllium
500
How were the elements formed?
By nuclear reactions inside stars.