Question

The subatomic particles on an atom are _______, ________ and __________.

• A. electrons, protons
• B. neutrons

Answer 1

• Atom is composed of electrons, protons and neutrons.
• Protons and neutrons are subatomic particles present in the nucleus of an atom.
• Electrons revolve around the nucleus in a fixed orbit known as energy shells.
• Proton- A proton is a positively charged subatomic particle present in the nucleus of an atom.
• It is denoted by the letter 'p' in chemistry.
• It was discovered by Eugen Goldstein.
• The mass of a proton is 1.672×10⁻²⁷ kg.
• The charge present of a proton is equal to an electron in magnitude, but opposite in sign.
• The charge present on a proton is 1.602×10⁻¹⁹ C.
• Electron- An electron is a negatively charged subatomic particle revolving around the nucleus of an atom.
• It is denoted by the letter 'e' in chemistry.
• It was discovered by J.J.Thomson.
• The mass of an electron is 9.109×10^-31 kg.
• The charge present on an electron is -1.602×10⁻¹⁹ C.
• Neutron- A neutron is a neutral subatomic particle present in the nucleus of an atom.
• It was discovered by James Chadwick.
• It has a rest mass equal to 1.674 × 10⁻²⁷ kg.

Hence, The subatomic particles on an atom are electrons, protons, and neutrons.