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Sunday, 3 June 2018

Atoms are composed of:

  By GK Planet Team       Sunday, 3 June 2018
Q. Atoms are composed of:
  1. Electrons and protons
  2. Electrons only
  3. Protons only
  4. Electrons and Nuclei
Answer: D
Atoms are composed of Electrons and Nuclei.
·   Every atom is composed of a nucleus and one or more electrons bound to the nucleus.
·   The nucleus is made of one or more protons and typically a similar number of neutrons.
·   Protons and neutrons are called nucleons. More than 99.94% of an atom's mass is in the nucleus.
·   The protons have a positive electric charge, the electrons have a negative electric charge, and the neutrons have no electric charge.
·   If the number of protons and electrons are equal, that atom is electrically neutral.
·   If an atom has more or fewer electrons than protons, then it has an overall negative or positive charge, respectively, and it is called an ion.
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