Chemistry
State what is a proton. What is the significance of the number of protons found in the atoms of each of the different elements.
Atomic Structure
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Answer
A proton [p] is a subatomic particle in the nucleus of an atom having unit positive charge 1.602 x 10-19 coulombs and mass of 1.670 x 10-24 g. It is 1837 times as heavy as an electron.
As elements are arranged on the basis of the number of protons in their respective atoms, therefore, proton helps in determining and understanding the structure and behaviour of an atom. Protons also determine the positive charge of the nucleus in the atom.
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Related Questions
State What are isotopes.
Write down :
(i) the mass number of the atom having 20 neutrons and 15 protons.
(ii) the number of neutrons in the nucleus of an atom having atomic number 17 and mass number 37.
State the relation between the number of protons and the number of electrons in an atom.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of :
(i) aluminium
(ii) phosphorus