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Q: Valence electrons are present in the:
  • A. innermost as well as outermost shell of an atom
  • B. outermost shell of an atom
  • C. innermost shell of an atom
  • D. just outside an atom
Correct Answer: Option B - Electrons present in the outermost orbital/ shell are called valence electrons. Valancy is the number of electrons an atom must lose or gain to attain the nearest noble gas or inert gas state. The valence electrons are part of most of the chemical reactions because they contain more energy compared to the electrons present in inner orbits. It also gives us an idea of how readily the atoms can form bonds, the number of unpaired electrons, and how many atoms can take part.
B. Electrons present in the outermost orbital/ shell are called valence electrons. Valancy is the number of electrons an atom must lose or gain to attain the nearest noble gas or inert gas state. The valence electrons are part of most of the chemical reactions because they contain more energy compared to the electrons present in inner orbits. It also gives us an idea of how readily the atoms can form bonds, the number of unpaired electrons, and how many atoms can take part.

Explanations:

Electrons present in the outermost orbital/ shell are called valence electrons. Valancy is the number of electrons an atom must lose or gain to attain the nearest noble gas or inert gas state. The valence electrons are part of most of the chemical reactions because they contain more energy compared to the electrons present in inner orbits. It also gives us an idea of how readily the atoms can form bonds, the number of unpaired electrons, and how many atoms can take part.