Business Income Tax. For tax years beginning on or after January 1, 2015. corporations â 5.25 percent of net income. trusts and estates â 3.75 percent of net income.
Previously this substance had been known as a rare mineral of tiny colorless crystals, discovered in 1987 and named after the Poudrette family that operated the source quarry at Mont Saint-Hilaire, Quebec. GRANDIDIERITE is a bluish green mineral found primarily in Madagascar.
So I guess technically Astatine and Francium is the rarest natural element on the earth that exists. Technetium and Promethium should exist but they don't, so in a sense that would make them rarer. Astatine and Francium have been produced synthetically but it is hard to do because of the short half-life.