https://padlet.com/kendt20/gta2q2398qpm Biology/chemistry en-us 2017-06-07 04:30:54 UTC 2026-03-06 19:41:03 UTC hello@padlet.com kendt20 https://padlet.com/kendt20/gta2q2398qpm/wish/175496921 2017-06-07 04:46:14 UTC https://padlet.com/kendt20/gta2q2398qpm/wish/175496921 kendt20 https://padlet.com/kendt20/gta2q2398qpm/wish/175497063 - Elements can join together to form compounds
- Watere always contains twice as hydrogen as oxygen
- when chemical react with each other , the total mass of the chemical does not change
- pure oxygen has the same properties wherever it is found on the earth or even in space
- gases some of which are invisible have mass and different gases have different masses
- modern scanning tunnelling microscopes produce images of surfaces that look bumpy

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