terbium is synthetic i believe
Curium is a metal. It belongs to actinides.
Terbium has 65 electrons
Yttrium is a natural element found in the Earth's crust. It is not a synthetic element.
Terbium has a group number of 3.
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.
Yes
Nearly all, 99.988%, of tantalum found in nature is stable. The natural radioactive isotope, 180mTa, accounts for 0.012% of it, and is believed to have a very long half life of about 1,200,000,000,000,000 years. Like all elements, tantalum has synthetic radioactive isotopes.
it is wered
It is synthetic, but what we use to make concrete is natural AND synthetic.
Curium is a metal. It belongs to actinides.
Terbium has 65 electrons
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.
its natural