manual3204

joined 1 year ago
[–] [email protected] 82 points 9 months ago (5 children)

This was behind the medicine cabinet in my house.

[–] [email protected] 5 points 1 year ago (1 children)

Those numbers are the atomic numbers; they indicate how many protons an atom of that element contains.

[–] [email protected] 20 points 1 year ago (1 children)

Are they doing anything special to celebrate? Like a free download?