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Chlorine, with the atomic number 17 has one less proton than argon, with the atomic number 18. The atomic number is the number of protons.

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Q: What is one less proton than argon?
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What element has one less proton than Argon?

Thallium (Tl) has one more proton then mercury (Hg), mercury has 79 protons, Thallium has 80 protons.


Has one less proton than Berillium?

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Is the proton smaller than the electron?

Actually every proton has different size in different nucleus. But in general, Proton, 1x10-15 m or "a diameter of approximately one-millionth of a nanometer". The electron, the diameter is less than 1x10-18 m. Likewise, The diameter of an electron is less than 1/1000 the diameter of a proton.


Why is argon obtained before oxygen?

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What element has properties similar to both metals and non metals and has one less proton than carbon?

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