what are fundamental particles of an atom.
Answers
1.electron
2.proton
3.nuetron
Answer:
A fundamental particle also known as an elementary particle is one that cannot be broken into smaller pieces. An atom is not a fundamental particle because it consists of protons and neutrons in its nucleus and has a cloud of electrons orbiting the nucleus. Proton and neutrons are also not fundamental particles because they consists of quarks. However, quarks and electrons cannot be broken apart and are fundamental particles of an atom.
Explanation:
In 1897 J.J Thomsan discovered electron as a constituent of atom. He determined that an electron had a negative charge and had very little mass as compared to that of the atom. Since an atom was found to be electrically neutral it was inferred that some force of positive charge must be present in the atom. This soon lead to the experimental discovery of the proton which is a positively charged subatomic particle. Proton was found approximately 1840 times have your than an electron. Further experiments revealed that the atomic masses where more than that expected from the presence of just protones and electrons in the atom. For example, the mass of helium atom was expected to be double that of hydrogen atom but was actually found to be almost 4 times the mass of hydrogen atom. This suggested the presence of neutral particle with mass comparable to that of protons in the atom. Sir James Chadwick discovered this neutral particle and called it neutron subsequently in the year of 1932. Thus, Hui mein conclude that atoms are not indivisible but are made up of three fundamental particles.
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