What is H2O more commonly known as?
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What is the main gas found in the air we breathe?
Correct Answer(s): Nitrogen (around 78%)
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What orbits the nucleus of an atom?
Correct Answer(s): Electrons
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What is the name given to substances that are initially involved in a chemical reaction?
Correct Answer(s): Reactants
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At room temperature, what is the only metal that is in liquid form?
Correct Answer(s): Mercury
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Atoms of the same chemical element that have different atomic mass are known as?
Correct Answer(s): Isotopes
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What is the centre of an atom called?
Correct Answer(s): A nucleus
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K is the chemical symbol for which element?
Correct Answer(s): Potassium
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What is the third most common gas found in the air we breathe?
Correct Answer(s): Argon (around 1%)
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True or false? Bases have a pH level below 7.
Correct Answer(s): False
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