According to the Big Bang theory, normal matter composed of protons, neutrons, and electrons should account for roughly 5% of ...

An atom is the smallest unit of an element that retains its chemical properties. It is made of protons, neutrons, and electrons. (Image: M ...

Atoms are made up of a nucleus, protons and electrons. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Atoms are the basic units of matter.

If you expanded an atom to the size of a baseball, what would it look like? And how would the inside look if you sliced it open? The nucleus is the atom’s central core and contains more than 99.9 ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. This article was updated June 28 at 4:54 p.m. ET. Scientists have long wondered whether there is ...

Since the beginning of time, human beings have sought to understand what the universe and everything within it is made up of. And while ancient magi and philosophers conceived of a world composed of ...

Physicists have known for decades that particles called gluons keep protons and neutrons intact—and thereby hold the universe together. Yet the details of how gluons function remain surprisingly ...

Figure 1: Electron flux as a function of longitude in different L shells for the period 4–14 January 2013. Figure 2: Dependence of an electron’s drift path on its altitude and L shell. Figure 3: ...

Particle detectors play a crucial role in our understanding of the fundamental building blocks of the universe. They allow scientists to study the behavior and properties of the particles produced in ...

Inside the nucleus of some atoms, protons appear to be doing very unexpected things. They are pairing up far more often than usual when they get extremely close to each other, and physicists don’t ...