Question

Which of these pairs would form an ionic bond?

K and Br
C and H
H and O
Cu and Cu

Answer 1

Answer:

K and Br would form an ionic bond.

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^1K:19=1s

2

2s

2

2p

6

3s

2

3p

6

4s

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^6K

+

:18:1s

2

2s

2

2p

6

3s

2

3p

6

Electronic configuration of bromine:

Br:35=1s^22s^22p^63s^23p^64s^23d^{10}4s^24p^5Br:35=1s

2

2s

2

2p

6

3s

2

3p

6

4s

2

3d

10

4s

2

4p

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^6Br

−

:36:1s

2

2s

2

2p

6

3s

2

3p

6

4s

2

3d

10

4s

2

4p

6

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

Answer 2

Answer:

K and Br is the answer

Explanation:

I know this because i just did it on edgenuity so yep.