These particles are capable of penetrating deep into atoms because of their neutral charge. Neutrons are generated in large number in nuclear power plants, where they initiate and maintain nuclear reaction. In fact, tin has as many as ten isotopes. The number of isotopes of an element can be more than one. Neutrons in their nuclei, though the number of protons is the same. Hydrogen is the only element having no neutron.Įlements are found in many forms called isotopes. U-235 (uranium-235) is unstable as ratio of n/p is much high in it. The presence of neutrons makes a nucleus stable but as the ratio of n/p increases, the nucleus becomes unstable. So, the mass of proton or neutron can only be found up to some approximation. The second part may vary from one particle to another. Mass of neutron, or for that matter, mass of any composite particle can be thought of having two components:Ģ)The mass equivalent of energy that glues them together. They belong to a separates group of particles called leptons.
These fundamental particles interacted strongly with each other through a massless particle called gluon.Įlectrons are not composite particles. If we calculate the mass of neutron, it is found to be heavier than proton as it consists of two heavier fundamental particles that are down -quarks.Ģ x Charge on down quark + 1 x charge on up quarkĢ x charge on up quark + 1 x charge on down quark Up-quarks have + 2/3 and down- quarks have - 1/3 charge. Down- quarks are heavier than up -quarks. Neutrons are made of one up- and 2 down –quarks, whereas protons are made of 2 down- and one up- quarks. Quarks are fundamental particles which are found in six forms.
Both protons and neutrons are quark-based particles and are called Baryons. A neuron is a composite subatomic particle, belonging to a group of particles called Baryon.īaryons are particles which are made of 3 small particles called quarks.
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