The neutron is a subatomic particle found in the nucleus of the atom and has no charge. The number of neutrons in the nucleus is different for different elements. In some cases, the number of neutrons can vary within atoms of the same element.
For instance, the normal hydrogen atom does not have neutrons in the nucleus. However, the isotopes of hydrogen, deuterium and tritium, have neutrons in the nucleus. Deuterium has one neutron, while tritium has two neutrons in the nucleus.
Neutrons were discovered by James Chadwick in 1932. The mass of a neutron is 1.675 × 10^-24g, and it is 1,839 times heavier than an electron. Some atoms, such as uranium atoms, have many neutrons in the nucleus, which makes them heavy and unstable.Learn More
The sum of protons and neutrons is the mass number. The mass of an atom is contained mainly within the nucleus where the protons and neutrons live. An electron's mass does not contribute significantly to the mass of the atom.Full Answer >
A nuclear chain reaction is a series of fission reactions wherein the products become the driving forces for further chain reactions. This type of reaction generates constructive forces in the form of usable energy and destructive forces in the form of an explosion.Full Answer >
John Needham’s experiment involved placing a broth into a bottle, heating it and then sealing it. Days later, Needham found the presence of life, and eventually announced that life had been created from nonliving material. This supported the incorrect idea that life could come from nonliving things.Full Answer >
Aluminum has 14 neutrons, 13 electrons and 13 protons. Aluminum is a silvery-white metal. Its density is 2.70 grams per cubic centimeter. Its boiling point is 4,566 degrees Fahrenheit, and its melting point is 1,220.58 degrees Fahrenheit.Full Answer >