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What Are the First 20 Elements - Names and Symbols

Here are the names, element symbols, and atomic numbers of the first 20 elements of the periodic table. It's handy to know the first 20 ...

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  1. 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th 12th 13th 14th 15th 16th 17th 18th 19th 20th 21st 22nd
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  2. Th symbol
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  3. St, nd, rd th rules
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  4. Ordinal numbers
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  5. 1st superscript
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  6. ordinal numbers 1-31
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  7. Cantor's ordinal
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  8. 1st 10th
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