⏰ when
When was the noble gas group added to the periodic table?
Quick Answer
The noble gases were recognized as a new group in the 1890s, with argon discovered in 1894 and the others quickly following. Their discovery created Group 18 in the modern periodic table.
The Full Story
The noble gas group emerged in the 1890s after argon was discovered in 1894. Once argon had been identified, helium, neon, krypton, and xenon were soon added, showing that there was a whole family of very unreactive gases. This required the periodic table to be extended with a new group. Today these gases occupy Group 18 and are known for their low chemical reactivity.
Key Facts
1.Argon discovered in 1894
2.Helium, neon, krypton, and xenon followed in the 1890s
3.Became Group 18
YouTube Angle
Suggested video title for this topic:
"How one discovery forced chemists to add a whole new column"
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