Respuesta :
Answer: [tex]CaCl_2[/tex]
Explanation:
Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....
Halogen with n=3 is chlorine.
Alkaline earth metal with n = 4 is calcium.
An ionic bond is formed when an element completely transfers its valence electron to another element.
Electronic configuration of calcium
[tex][Ca]=1s^22s^22p^63s^23p^64s^2[/tex]
calcium atom will loose one electron to gain noble gas configuration and form calcium cation with +2 charge.
[tex][Ca^{2+}]=1s^22s^22p^63s^23p^6[/tex]
Electronic configuration of chlorine:
[tex][Cl]=1s^22s^22p^63s^23p^5[/tex]
Chlorine atom will gain one electron to gain noble gas configuration and form chloride ion with -1 charge.
[tex][Cl^-]=1s^22s^22p^63s^23p^6[/tex]
Here [tex]Ca^{2+}[/tex] cation and chloride [tex]Cl^{-}[/tex] anion combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]CaCl_2[/tex].
