Science Icons_part1/3

I have created these few, lets call it science icons as form of relax at 3d modeling :)  Of cource, the title “Science icons” only the title and it is only general naming. I can imagine a wide range of usage of these 3d models. As for example, with proper sizing It might be also used as any 2D art or as a reward or whatever. 
Each icon is on basis within circle about 60mm diameter and height of 3,5mm. 

However I would like to point out that design of these 3D models is strongly inspired or based on a pin from pinterest (https://pin.it/4uF6udOSs). Just not to take all the credit for myself. 

In total, I've created 21 icons, which I've divided into three part as follow:

Hope, someone will like it and enjoy the 3D prints :)