Exercises
Challenge your understanding of essential general chemistry concepts in this quiz. Explore questions about atomic numbers and element symbols, including helium and sodium, as well as noble gases and the composition of Earth’s atmosphere. Test what you know about common compounds such as table salt, the pH of pure water, electronegativity, elements that are liquid at room temperature, Avogadro’s number, and the main component of natural gas. This beginner-friendly chemistry quiz is a great way to review foundational facts from the periodic table and everyday chemical science.
Answer the questions below and check the explanation for each answer.
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Helium has an atomic number of 2, which means it has two protons in its nucleus.
The symbol 'Na' stands for Sodium. It comes from the Latin name 'Natrium'.
Nitrogen makes up about 78% of the Earth's atmosphere, making it the most abundant gas.
Argon is a noble gas, which are inert gases with a full valence shell.
Table salt is chemically known as Sodium Chloride, with the formula NaCl.
Fluorine has the highest electronegativity of all elements, making it very reactive.
Pure water has a neutral pH value of 7.
Mercury is one of the few elements that is liquid at room temperature.
Avogadro's number is 6.022 x 1023, representing the number of atoms or molecules in one mole of a substance.
Methane is the main component of natural gas, making up about 70-90% of its composition.
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