Atoms and molecules
2 marks · NormalState what is meant by:
an atom
a molecule
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(a) The smallest part of an element that can still be recognized as that element.
(b) A particle made up of two or more atoms chemically bonded together.
Common mistakes: Defining atom as a molecule; Defining molecule without mentioning two or more atoms
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Marking points
B1 (a) · 1 mark · Correctly states the definition of an atom.
B1 (b) · 1 mark · Correctly states the definition of a molecule.
Worked solution
a) An atom is the smallest piece of an element that can still be recognised as that element.
b) A molecule is a particle made from two or more atoms chemically bonded together. The atoms can be of the same or different elements.