What's 'A' in the Periodic Table?
In the context of the Periodic Table, 'A' usually stands for the atomic mass number, which is the total number of protons and neutrons in an element's nucleus.
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If you're looking for an element starting with 'A', try Aluminum or Argon. Both are pretty cool!
Not to be mistaken with an element, 'A' in the Periodic Table typically refers to atomic mass or mass number.
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