We did a quiz today so as to check on our understanding on the topic, Atoms & Molecules.
I have learnt that when a question asks us about the number of subatomic particles in an atom of XXX, we should list out the number of protons, electrons and neutrons but not the total number of subatomic particles in it. For example, if a question asks us about the number of subatomic particles in an atom of boron with a nucleon number of 10, we should not answer that the number of subatomic particles in an atom is 15. Instead, we should answer that there are 5 protons, 5 electrons and 5 neutrons.
I have also learnt that atoms form ions as atoms react when they are forming compounds. They tend to lose or gain electrons so as to get the electronic configuration of a noble gas.
(An example of a key in the periodic table)
Sources: Google Images
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