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With this an electron configuration only electrons from outer level can be involved in forming chemical bond.
B. 3 
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The atom can involve 3 electrons in bonding.

There are 3 valence electrons in the outermost shell, they participate in the bonding. After the removal of those valence electrons, the atom attains a noble stable electronic configuration and it requires a very high amount of energy to remove the electron.

How are atoms bonded together?

The outer electrons of atoms can form bonds in one of three ways:

  • Atoms can exchange electrons with one another.
  • Atoms close to one other can share electrons.
  • All the atoms in a substance can share electrons.

As an example, visualize a sodium atom, which has one electron on its outermost orbit, approaching a chlorine atom, which has seven. The chlorine atom can be thought of as lacking one electron because these atoms need eight electrons to fill their outermost shell. A sodium chloride system is created at a lower total energy level when the sodium atom offers its lone valence electron to close the hole in the chlorine shell.

Learn more about bonding in atoms here:

https://brainly.com/question/2017478

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