Wikijunior:The Elements/Strange Element

The mysterious element not listed on any periodic table.

Does not show the position of the neutron in the periodic table of elements. Location in the periodic table: Directly above the noble gas helium. It comes before the hydrogen (atomic number 1) and has the atomic number 0.

How does it look? How does it smell, how does it taste?

Individual neutrons cannot be seen, smelled or tasted.

Since neutrons do not attract each other, there are no clumps of neutrons on Earth. It is therefore not surprising that neutrons are not listed in the periodic table of the elements. But there are stars made of this element.

Fictional representation of a red giant neutron star (NASA)

How was it discovered?

Walther Bothe and Herbert Becker produced this elementary particle in 1930 and verified it with a measuring instrument. But they didn't realize what they had discovered. It wasn't until two years later that James Chadwick found out what kind of particle it was and called it a neutron.The average lifespan of individual free neutrons is just under 15 minutes?

Where does the name come from?

The neutron was so named because it is electrically neutral. It has the symbol n. As an element, it is also called neutronium.

Where is it found?

One produces single neutrons in nuclear reactors.

The neutron star closest to us. It is called RX J1856.5-3754.

Astronomers have captured images of stars made up only of neutrons.

What possible uses are there?

Neutrons are used in radiation therapy. Neutrons play an important role in nuclear fission.

Is it dangerous?

Yes! Neutron radiation is the most dangerous type of radioactive radiation.

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  radioactive