Natural beryllium isotopes are: Be-7, Be-9, Be-10.
no it is not
one
Beryllium 9 and Beryllium 10, however, beryllium 10 is not a fully stable element, and will decay in the course of something like 1 billion years, so is often considered stable nonetheless.
The half-life of beryllium varies according which isotope of this element we consider. There are a number of isotopes, and half-lives range from a small fraction of a second to many thousands of years. Use the link below to see a list of the isotopes of beryllium and their half-lives.
Magnesium has some similarities with beryllium.
The use of beryllium is legal but it is mandatory to respect the working precautions. For some forms of beryllium (pure beryllium, pure beryllium oxide or many components from these materials) the trade is severely internationally controlled.
Beryl
yes, all elements have isotopes. some stable, some radioactive.
Atomic mass numbers are not properties of elements overall, but only of particular isotopes of elements. The only stable element with an isotope with mass number 11 is boron. Beryllium and carbon also have isotopes with mass number 11, but these are radioactive.
Some examples are deuterium and tritium which are radioactive isotopes of hydrogen.
Obtain some beryllium;Take a picture of it.See the link bellow; but be sure that the fresh surface of beryllium is more white than the image.
These isotopes are unstable and emit radiation.