Learn and explore Dr Doe's chemistry quizzes.
What is the most reactive group of elements in the periodic table?
Alkali metals
Noble gases
Halogens
Transition metals
What is the chemical formula for sodium chloride?
Na2Cl
NaCl
KCl
NaC2
Which element has the highest electronegativity?
Oxygen
Fluorine
Nitrogen
Chlorine
Which process separates a liquid mixture into its individual components?
Evaporation
Filtration
Distillation
Crystallization
Which gas is most abundant in Earth’s atmosphere?
Carbon Dioxide
Argon
Which scientist developed the periodic table?
Dmitri Mendeleev
Albert Einstein
Isaac Newton
Marie Curie
Which of the following is an alkali metal?
Magnesium
Calcium
Sodium
Aluminum
What is the molecular formula of water?
H2O
H2O2
O2
HO2
What is the atomic number of carbon?
6
12
8
14
What is the primary component of natural gas?
Methane
Butane
Ethane
Propane
Which of the following is NOT a noble gas?
Helium
Neon
What is the pH of a neutral solution at 25°C?
0
7
1
In which type of bond are electrons shared between atoms?
Ionic bond
Covalent bond
Metallic bond
Hydrogen bond
Which of the following is a covalent compound?
KBr
MgO
Which element is represented by the symbol 'Fe'?
Iron
Francium
Fermium