Argon is a naturally occurring element.
It is not chemically reactive and is heavier than air - so your argon balloons will sit on the floor not the ceiling!
Argon is a gas at STP.
natural
According to wikipedia, argon has 24 known isotopes. 40Ar is most abundant at about 99.6% of natural argon.
Acrylic is a synthetic fiber made from polymers derived from petroleum or natural gas. It is not a natural fiber like cotton or wool.
It is a synthetic addition polymer.
Argon is a gas. It is not synthetic.
Neither. Argon is naturally occurring noble gas
It is synthetic, but what we use to make concrete is natural AND synthetic.
Argon is a natural element found in the air.
natural
is bromine natural or synthetic?
Argon is a gas at STP.
Polyester is synthetic.
it is synthetic
It is mainly the atmosphere. Compounds of argon are not natural on earth.
they are synthetic.
Yttrium is a natural element found in the Earth's crust. It is not a synthetic element.