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Electronic configuration of first 18 elements?
Electronic Configuration of First 18 Elements


Introduction

The electronic configuration of an element describes the distribution of electrons in its atomic orbitals. It is a key factor in determining an element's chemical properties and behavior.

Electronic Configuration of First 18 Elements


  • Hydrogen (H): 1s1

  • Helium (He): 1s2

  • Lithium (Li): 1s2 2s1

  • Beryllium (Be): 1s2 2s2

  • Boron (B): 1s2 2s2 2p1

  • Carbon (C): 1s2 2s2 2p2

  • Nitrogen (N): 1s2 2s2 2p3

  • Oxygen (O): 1s2 2s2 2p4

  • Fluorine (F): 1s2 2s2 2p5

  • Neon (Ne): 1s2 2s2 2p6

  • Sodium (Na): 1s2 2s2 2p6 3s1

  • Magnesium (Mg): 1s2 2s2 2p6 3s2

  • Aluminum (Al): 1s2 2s2 2p6 3s2 3p1

  • Silicon (Si): 1s2 2s2 2p6 3s2 3p2

  • Phosphorus (P): 1s2 2s2 2p6 3s2 3p3

  • Sulfur (S): 1s2 2s2 2p6 3s2 3p4

  • Chlorine (Cl): 1s2 2s2 2p6 3s2 3p5

  • Argon (Ar): 1s2 2s2 2p6 3s2 3p6



Explanation


  • The electronic configuration of each element is determined by the number of electrons in its atomic orbitals.

  • The first number in each configuration represents the principal quantum number (n) and indicates the energy level of the electrons in the atom.

  • The letters and numbers after the principal quantum number represent the type and number of subshells in the energy level.

  • The superscripts represent the number of electrons in each subshell.

  • The electronic configuration of an element determines its chemical properties and behavior, as it determines the number and arrangement of electrons available for bonding and reactions.



Conclusion

The electronic configuration of the
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