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In which option do all three particles have the same electronic configuration?

And the same number of neutrons? (7N , 8O , 9F ,10Ne , 12Mg)

(a) 15N3- 16O2- 19F-

(b) 18O2- 19F- 20Ne

(C) 19F- 20Ne 23Na+

(d) 22Ne 23Na 24Mg2+

Respuesta :

ardni313

b. ₈¹⁸O²⁻ , ₉¹⁹F⁻ , ₁₀²⁰Ne

Further explanation

The Atomic Number (Z) indicates the number of protons and electrons in an atom of an element.

Atomic number = number of protons = number of electrons ⇒ neutral number

Atomic mass is the sum of protons and neutrons

Atomic Number (Z) = Atomic mass (A) - Number of Neutrons

  • ₈¹⁸O²⁻

Atomic mass = 18

Atomic number = 8 , gain 2 electron ⇒ total 10 electrons

Configuration : 1s², 2s², 2p⁶ (10 electrons)

Neutrons : 18 - 8 = 10

  • ₉¹⁹F⁻

Atomic mass = 19

Atomic number = 9 , gain 1 electron ⇒ total 10 electrons

Configuration : 1s², 2s², 2p⁶ (10 electrons)

Neutrons : 19 - 9 = 10

  • ₁₀²⁰Ne

Atomic mass = 20

Atomic number = 10

Configuration : 1s², 2s², 2p⁶ (10 electrons)

Neutrons : 20 - 10 = 10

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