The beloved Hubble Space Telescope is reaching its 35th anniversary, and over the years it has taken some stunning images.

Atoms are very small. They have a radius of around 1 × 10 10 metres. This symbol shows that chlorine has 35 particles in the nucleus (protons and neutrons), 17 of which are protons. It also tells ...

The absence of a nucleus and other membrane-bound organelles differentiates prokaryotes from another class of organisms called eukaryotes. Most prokaryotes carry a small amount of genetic material ...

Electrons are in regions around the nucleus that are different distances away from the nucleus ... 4th Period: Potassium and Calcium—Electrons go into the fourth energy level. A small piece of sodium ...

This can be seen in the new Hubble image, which captures a bright ring around the galaxy’s nucleus. Another possible ...