In neutron stars, which exhibit even more intense gravitational forces, the electrons have merged with the protons to form neutrons.

The hydrogen fuses to form helium and free neutrons.

If the world had been created without the exclusion principle, quarks would not form separate, well-defined protons and neutrons.

When the universe was 0.00001 seconds old, quarks combined to form protons and neutrons.

How do we form protons and neutrons?

In groups of three, scientists believe, they combine to form the protons and neutrons that combine in the atomic nucleus.

Electrons react with protons to form neutrons and thus no longer supply the necessary pressure to resist gravity, causing the star to collapse.

In neutron stars, subject to even stronger gravitational forces, electrons have merged with protons to form neutrons.

The gluon holds together quarks to form protons and neutrons.

This forces the electrons and protons in the remaining core to form neutrons, which have their own degeneracy pressure.