Our common test paper was given back to us during today's Science lesson. Then, we went through the answers so as to correct our mistakes and also to check if our paper has been marked correctly.
After going through the paper, I learnt that:
- The smallest particle in an element is an atom while the smallest particle in a compound is a molecule. This is because element is a substance which cannot be broken down further by chemical methods and thus, its atoms stand on its own. As for compound, it is a substance which is made up of two or more different elements chemically combined together. Hence, its atoms are also combined together to form a molecule.
- The number of neutrons in the same type of atoms can differ from one another. For example, the number of neutrons in carbon (an element) can be 6 or 7.
- An atom is electrically neutral as the number of protons which have a positive charge of 1 is equal to the number of electrons which have a negative charge of 1.
(Atoms)
(Molecules)
Sources: Google Images
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