A neutron is a fundamental part of the nucleus of all atoms and is hence contained within a non metal a metal or a metalloid
lead
When it is mixed or alloyed with beryllium, polonium can be a neutron source: beryllium releases a neutron upon absorption of an alpha particle that is supplied by 210Po. It has been used in this capacity as a neutron trigger or initiator for nuclear weapons
Usually boron is alloyed with steel, boron is a very good neutron absorber.
Well, a neutron activation analysis test can find this out all in a single test.
The neutron.
A rare-earth metal with the symbol Dy and atomic number 66. It is a metal with a metallic silver luster and a high thermal neutron absorption cross-section. Dysprosium has seven isotopes, the most abundant of which is 164 Dy. It is used for its high thermal neutron absorption cross-section in nuclear reactors and its high magnetic susceptibility in data-storage applications.
The neutron is called the neutron because it it electrically neutral, hence the neu- prefix
There are different answers for different questions, lets separate the two possible questions you might mean; a metal absorbing the radiation, or the metal becoming radioactive because of the radiation. Nuclear radiation is composed of neutrons, obviously you see why some metal are called neutron absorbers. In neutron absorbers the metal (e.g silver, lithium) are isotopes, (e.g uranium-235, uranium-238, not all isotopes are radioactive, but the uranium to the left is) they require neutrons to match the ratio of protons or neutrons to transform it into a different form. Neutron absorbers do not absorb aswell after the amount of neutrons needed to transform is obtained. Depending on the density and thickness of the material used (e.g a sheet of paper blocks alpha radiation really well!) the radiation may just simply pass through or be partially deflected. The conclusion is if the metal is a neutron absorber its absorbs it (without becoming radioactive), if the metal is in its normal form it deflects the radiation. If the radiation is an intense neutron beam it may irradicate the material and make it radioactive (this is extremly rare for non-isotope metals though for isotopes, if the isotope is deficient in the normal amount of neutrons, then it is highly likely to absorb it) as the intense beam of neutrons is extremly likely to pass straight through, and if it doesn't it is also extremly likely the blocked radiation will be deflected as there is not a extra space in the non-isotope metal for the extra neutron. If this extremly rare event occurs it makes the metal's atoms unstable, and they start to collapse, ( or exchange subatomic particles and expand depending on the metal!) and also starts to emit radiation.
No. A neutron carries no charge.
There is no such thing as a "positive neutron" or a "negative neutron". A neutron is always neutral.
James chadwick was the discoverer of neutron. He gave the famous neutron reaction.