Chemical symbols

你需要知道的

• The number of protons in an atom decides which element it is, and this is the atomic number shown on the periodic table.
• Each element has a one- or two-letter symbol, such as C for carbon and Li for lithium, with a capital first letter.
• Some symbols come from older names and are not obvious, such as Na for sodium and Fe for iron.
• If a symbol is unfamiliar, the periodic table lists both the symbol and the name so it can be checked.

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