A half mixed compound?

Some lessons learnt during high school chemistry remain with me, none more so than the distinction between a mixture and a compound:

Mixture: a substance consisting of two or more substances mixed together without any chemical bonding between them.

Compound: a substance that contains atoms of two or more chemical elements held together by chemical bonds.

As a teenager I did not object to being termed “half caste.” For the past few years I have preferred, and asked others to use, …