I believe, due to complicated scientific discoveries, that Rubidium is in fact a NATURAL element.
Most rubidium (about 72.2%) is of the isotope 85Rb, which is stable. The remainder of natural rubidium (about 27.8%) is of isotope 87Rb, which has a half life of 4.88 x 1010 years and decays into 87Sr. There are a number of other isotopes of Rubidium, all of which are synthetic, having half lives ranging from less than a microsecond to something more than 86 days.
Rubidium has two natural isotopes (85Rb and 87Rb) and 30 artificial isotopes.
Yes it is.
It is synthetic, but what we use to make concrete is natural AND synthetic.
Atomicity ? Well one definition is the same as valency which for rubidium is 1.
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
natural