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lys-0071 [83]
3 years ago
8

This chart lists four elements from the periodic table.

Chemistry
2 answers:
aksik [14]3 years ago
3 0
Iodine and Calcium is the correct answer
PilotLPTM [1.2K]3 years ago
3 0

Answer: d. iodine and calcium

Explanation: Ionic bonds are formed by transfer of electrons between metal and non metals.

Covalent bonds are formed by sharing of electrons between non metals

Electronic configuration of calcium:

[Ca]=[Ar]4s^2

Calcium atom will lose two electron to gain noble gas configuration and form calcium cation with +2 charge.

[Ca^{2+}]={Ar]

Electronic configuration of iodine:

[I]=[Kr]4d^{10}5s^25p^5

Iodine atom will gain one electron to gain noble gas configuration and form iodide ion with -1 charge.

[I^-]=[Kr]4d^{10}5s^25p^6

In calcium iodide the one electron from calcium metal gets transferred to iodine atom and thus form an ionic bond to give CaI_2

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