_KCIO, - __KCI + ___02
1 answer:
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Answer and Explanation:
The basic unit which are that are important in chemistry are meter, kilogram ,mol,
Candela which is the unit of luminous of intensity is not so important in physics
(a) SI unit of length is meter (m)
(b) Si unit of volume is
(c) Si unit of mass is kilogram (kg)
(d) SI unit of time is second (s)
(e) SI unit of temperature is kelvin (K)
Answer : The correct statement is, Alpha particles have a mass number of 4.
Explanation:
Alpha particle : It is also known as alpha radiation or alpha ray that consists of 2 protons and 2 neutrons that are bound together into a particle that is identical to the helium nucleus. It is produced in the process of alpha decay.
Alpha decay : In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units.
The general representation of alpha decay reaction is:
Conversion of proton into neutron leads to releasing in positron.
Positron emission : It is defined as the emission process in which positron particle is emitted. In this process, a proton gets converted to neutron and an electron neutrino particle.
Conversion of neutron into proton leads to release in electron or beta particle.
Beta minus decay : It is a type of decay process, in which a neutrons gets converted to proton, an electron and anti-neutrino. In this the atomic mass number remains same.
The beta minus decay equation is represented as,
(A is the atomic mass number and Z is the atomic number)
From the given statements we conclude that, the statement alpha particles have a mass number of 4 is correct statement while the other statements are wrong of alpha particles.
Hence, the correct statement is, Alpha particles have a mass number of 4.