Answers

2014-08-25T20:10:05+08:00
Atoms are made up from protons and neutrons and electrons. The protons and neutrons are in the middle of the atom. They are called the nucleus. The nucleus is surrounded by a cloud of electrons with a negative charge which are bound to the nucleus by an electromagnetic force. Protons and neutrons are made up of even smaller particles called quarks.
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2014-08-26T19:42:48+08:00
Atoms are made of protons and neutrons
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