RRB NTPC General Science

RRB NTPC Exam 2016 will test you on Atomic Structure and its components.

RRB NTPC Exam 2016 #Daily Infographic on General Science (Chemistry)

RRB NTPC:Atomic Structure
Created by Logical Nerd

  • Protons and neutrons are heavier than electrons and reside in the center of the atom, called the Nucleus
  • Electrons are extremely lightweight and exist in a cloud orbiting the nucleus. The electron cloud has a radius 10,000 times greater than the nucleus.
  • Protons and neutrons have approximately the same mass. However, one proton weighs more than 1,800 electrons.
  • Atoms always have an equal number of protons and electrons, and the number of protons and neutrons is usually the same as well.
  • Adding a proton to an atom makes a new element, while adding a neutron makes an isotope, or heavier version, of that atom.
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    Protons are positively charged particles found within atomic nuclei. The charge on a Proton is 1.602×1019 C , where C stands for coulomb. They were discovered by Ernest Rutherford in experiments conducted between 1911 and 1919.

  • Electrons

    Electrons have a negative charge and are electrically attracted to the positively charged protons. The charge on an electron is 1.602 10-19 C, where C stands for Coulomb. Electrons surround the atomic nucleus in pathways called orbitals. They were discovered by J.J. Thomson.
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    span style="color: #000000;">Neutrons are uncharged particles found within atomic nuclei. A neutron’s mass is slightly larger than that of a proton. Like protons, neutrons are also made of quarks — one “up” quark and two “down” quarks. Neutrons were discovered by James Chadwick.




How to Prepare General Science Section for RRB NTPC Exam

References: www.livescience.com


  1. Manav, Atomic Number refers to the Number of protons present in a nucleus while Mass Number refers to the total number protons and neutrons present in a nucleus. These protons and neutrons together , are also known as Nucleons.

  2. Sir what is the difference between atomic number and mass nSir what is the difference between atomic number and mass numberumber

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