What's the make-up of the element sodium?
Answer:
Sodium (Na) has an atomic number of 11. This means it has 11 protons. If it is neutral (and not in ionic form) it has 11 electrons.
The atomic weight of Sodium is about 23. Electrons are relatively weightless so we do not need to consider them in the weight. But protons have a value of 1 and so do neutrons.
Given that we know there are 11 protons (23-11) that would meant that there are 12 neutrons. (Neutrons do not affect the charge of the element given that they are neutral, hence the name)
So in Na there are
11 Protons
11 Electrons
12 Neutrons
protons, neutrons and electrons
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