its natural
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
Yttrium is a natural element found in the Earth's crust. It is not a synthetic element.
they are synthetic.
natural
Nearly 100% of manganese found in nature is 55Mn, which is not radioactive. Trace quantities of 53Mn, which is radioactive, are found in nature, but they are insignificant. Like all elements, synthetic radioactive isotopes of manganese exist.
natural
True. Compounds and mixtures can be either synthetic or natural. Synthetic compounds are created by humans in a laboratory while natural compounds are found in nature. Similarly, mixtures can also be either synthetic or natural based on their origin.
Acrylic is a synthetic fiber made from polymers derived from petroleum or natural gas. It is not a natural fiber like cotton or wool.
Plastic toys are synthetic