Question

Which of these pairs would form an ionic bond? k and br c and h h and o cu and cu?

Answer 1

K and Br would be your answer

Answer 2

Answer: K and Br

Step-by-step explanation: Ionic compounds are formed by the transfer of electrons between metals and non metals.

Electronic configuration of potassium:

`K:19=1s^22s^22p^63s^23p^64s^1`

Potassium atom will loose one electron to gain noble gas configuration and form potassium cation with +1 charge.

`K^+:18:1s^22s^22p^63s^23p^6`

Electronic configuration of bromine:

`Br:35=1s^22s^22p^63s^23p^64s^23d^(10)4s^24p^5`

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

`Br^-:36:1s^22s^22p^63s^23p^64s^23d^(10)4s^24p^6`

In potassium bromide
`(KBr)` ,one electron from potassium metal gets transferred to bromine atom.