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what makes the study of valence electron essential?

Sagot :

Indrawboyidn

The study of valence electron essential because it determines the bond between the elements and the location of the elements in the periodic system

Further explanation

Valence electrons are electrons used in forming bonds and are in the outer shell of an element.

The bond that occurs can be either an ionic bond or a covalent bond

Valence electron determination using electron configurations.

Determination of electron configurations based on principles:

  • 1. Aufbau: Electrons occupy orbitals of the lowest energy level
  • 2 Hund: electrons fill orbitals with the same energy level
  • 3. Pauli: no electrons have the same 4 quantum numbers

The main group elements usually have valence electron configurations in the ns and np subshells

While the transition elements in the subshells (n-1) d

The location of the elemental groups in the periodic system is determined by the number of valence electrons filling the last sub-shell

The period of an element is determined from the valence shell (the biggest main quantum number (n) )

Example

Na: [Ne] 3s¹

Valence shell: 3s¹ with valence electron 1, located in period 3 (n = 3) and group 1A (ns¹)

Ca: [Ar] 4s²

Valence shell: 4s₂ with valence electron 2, located in period 4 (n = 4) and group 2A (ns²)

Learn more

electron configurations using the Aufbau rule

https://brainly.ph/question/1129723

the reactivity of element

https://brainly.ph/question/505365

non metals element

https://brainly.ph/question/33505

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