This image depicts the radium atom’s pear-shaped nucleus of protons and neutrons in the center, surrounded by a cloud of electrons (yellow), and an electron (yellow ball with arrow) that has a ...

In diagrams and illustrations of cells, DNA is sometimes shown as a mass in the cell's nucleus, like a bowl of ramen noodles. For many years, it's been standard practice to take images of cells that ...

Every time a eukaryotic cell divides, it faces a monumental challenge: It must carefully duplicate and divide its genetic material (chromosomes) equally, and then rebuild the nuclear envelope around ...

Quantum mechanics explains why the electrons can keep spinning indefinitely. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. An atom is best ...