As far as we know, there are much less than a million. All of the known elements in the world are listed on the Periodic Table of Elements.
Yes, an element is composed of millions of identical atoms.
The element that can stay radioactive for millions of years is plutonium. This is where most nuclear power plant energy comes from.
Plutonium is the element named after the planet Pluto. It is a radioactive element with a half-life of thousands of years, not millions.
Dimonds are made out of carbon wich has been compressed for millions of years.
Technetium (Tc) is the element that has no stable isotopes. All of its isotopes are radioactive with half-lives ranging from minutes to millions of years.
Probably Plutonium but I do not think it is named after Pluto.
carbon is very much stable as element, and its outermost shell contains 4 electrons.
Yes, an element is made of millions of atoms with the same number of protons and electrons, but some atoms will have a slightly different number of neutrons. These different atoms are called isotopes.
The chemical symbol of an element doesn't depend on the number of atoms.
Gold is a natural element and was therefore created at the same time as the rest of Earth, and is located in millions of areas all around the world.
Carbon is a building block of all life and is an element that naturally occurs on this planet. There is the same volume of carbon on the planet today as their was millions of years ago.
An element is composed of a bunch of the same type of atoms. There are about 90 or so naturally occuring elements, and they're all on the periodic table. A compound is made up of two or more elements chemically bonded together. There are millions of compounds.