Henry Cavendish, a young English chemist, discovered that hydrogen is a separate substance in 1766. It was also discovered that hydrogen is found naturally in the atmosphere, and when hydrogen is burned it produces water vapor
Rhyolite has probably been around as long as Earth has, or about 4.6 billion years.
Humans have been on Earth for approximately 0.2% of Earth's history, which is estimated to be around 4.5 billion years. This means humans have been around for about 200,000 years.
Nitrogen, has a atomic weight roughly 14 times heavier then that of hydrogen.
Granite has been around for millions of years, forming deep within the Earth's crust under extreme heat and pressure. The granite we see today is the result of geologic processes that have been occurring for around 300 million years.
A hydrogen atom has one proton in its nucleus (and rarely a neutron, or two) and one electron in orbit around it. A hydrogen ion is formed when that electron is loaned out to another atom that wants to borrow it to form a chemical bond. For example, in hydrochloric acid (HCl), the hydrogen and the chlorine form ions in water, and the hydrogen floats around as H+ and the chlorine as Cl-. The difference between the hydrogen atom and the hydrogen ion is that the electron is still hanging around the proton in the hydrogen atom, and it's been loaned out (leaving the proton by itself) in the ion.
Not invented. Natural element, been around as long as the universe has existed.
how long has deforestation been around
As long as guns have been around.
how long has the london eye been around for
As long as So Random has been around.
234 years fool
how long have boxing been around?
boner
They have always been around
it has been around for a long time.
For as long as there has been written language.
The time football has been around for is a long timeFootball has been around for a long time but we do not know how long it has been around