Physicists have measured a nuclear reaction that can occur in neutron star collisions, providing direct experimental data for ...

The discovery that helium and iron can mix at the temperatures and pressures found at the center of Earth could settle a long-standing debate over how our planet formed.

Helium ion, two neutrons, two protons and three electrons. Nuclear fission close nuclear fissionThe splitting of a large nucleus to produce two smaller ones. Two or three neutrons are also ...

An alpha particle consists of two protons and two neutrons and is often described as a helium nucleus. It is not the same as a helium atom as it does not contain any electrons but it is written ...

The atom with eight protons in its nucleus (atomic number 8) is oxygen. Each energy level holds a certain number of electrons before electrons go into the next level. 1st Period: Hydrogen and ...

This rare form of helium is called helium-3 because it has two protons and one neutron in its nucleus. Normal helium, which is 700,000 times more common than helium-3, is called helium-4 because ...

So in the helium example, there would be four protons and two electrons in the nucleus to yield a mass of 4 but a charge of only 2. Rutherford also put out the idea that there could be a particle ...

Primordial helium from the beginning of the solar system may be stuck inside Earth's solid core, new research suggests. The findings could have implications for a long-standing debate about how ...

The two Nasa astronauts have been marooned at the International Space Station since June last year after multiple helium leaks incapacitated the thruster systems of their spacecraft – Boeing’s ...