Synthetic
Sodium hydroxide is a manmade substance.
Sodium chloride can be prepared in laboratory but this process is not economically important. Sodium chloride is a natural mineral (halite).
It is synthetic, but what we use to make concrete is natural AND synthetic.
is bromine natural or synthetic?
Polyester is synthetic.
it is synthetic
synthetic
Sodium is not synthetic. It is a natural element.
Cotton and wool are natural; nylon is synthetic.
Semi-synthetic
synthetic
they are synthetic.