Question

Circle the element in the following list that has a natural or already existing stable octet and therefore does not participate in bonding:

a) K
b) Br
c) Kr
d) Cu
e) Lr

Answer 1

Krypton (Kr) is the element that has an existing stable octet and does not generally participate in bonding because it is a noble gas with a full valence shell.

Step-by-step explanation:

The element in the list that has a natural or already existing stable octet and therefore does not participate in bonding is Kr (krypton). This is because krypton is a noble gas, which means it has a full valence shell, usually two for helium and eight electrons for the other noble gases. This full valence shell gives these elements a natural stability, and they have little tendency to react and form bonds with other elements.