https://padlet.com/41830/q4azx9ubzat Made with the best of intentions en-us 2019-10-17 20:22:45 UTC 2025-05-15 16:13:40 UTC hello@padlet.com 41830 https://padlet.com/41830/q4azx9ubzat/wish/399269154 1. So you can know what group your element is in 
2. Helium has first gas filling balloons and dirigibles
3.To find the elements easier rather than checking the the whole periodic table
4. I would place it in the noble gases.]]> 2019-10-17 20:27:26 UTC https://padlet.com/41830/q4azx9ubzat/wish/399269154 41830 https://padlet.com/41830/q4azx9ubzat/wish/399730321 2019-10-18 20:15:01 UTC https://padlet.com/41830/q4azx9ubzat/wish/399730321