None. All elements are unique! =D
- Emily
Yes, an element is composed of millions of identical atoms.
I suppose that you think to a chemical element (possible having natural isotopes).
The atomic number of an element declares its number of protons as well as the number of electrons which are identical to each other.
Each atom of an isotope of beryllium (or of another element) is different from the atoms of an other isotope. But all the atoms of an isotope are identical.
All protons are identical. What is different between elements is the number of protons.
tantalum atomic number 73
In 1800, the element sulfur was thought to be identical to the element selenium, which is directly above it in the periodic table. This was due to their similar chemical properties and physical appearances. It wasn't until the 19th century that their distinct differences were recognized through further scientific research and experimentation.
atoms are of an element are the same becasue the are all made from identical particles. there is no way to distinguish one electron from another electron. the same is true for neutrons and protons. so by virtue of the fact that its constituents are identical, all atoms of the same element are identical.
Yes, an element is composed of millions of identical atoms.
an element
All of the following
The number of electrons in isotopes is identical.
I suppose that you think to a chemical element (possible having natural isotopes).
Because the existence of isotopes was discovered not all atoms of an element are identical.
They are identical.
This is one of John Dalton's four postulates in his Modern Atomic Theory of Matter.
No. Compounds can have any number of elements above one.