The atomic number, or number of protons
Every element is unique. So, the element Helium isn't the same as any other element(s). It is however similar to other elements in it's family (inert gases).
Well, if you want to get technical, EVERY element is different from every other element; each is unique. Hydrogen is the "simplest" element, having only one proton (and very rarely, one neutron) in the nucleus; every other element has two or more protons and usually as many or more neutrons as protons. Perhaps that's the difference you're looking for; hydrogen normally doesn't have ANY neutrons, while every other element always has some.
For every element on the domain, the relationship must allocate a unique element in the codomain (range). Many elements in the domain can be mapped to the same element in the codomain but not the other way around. Such a relationship is a function.
The element carbon is unique because it has four valence electrons, allowing it to form four bonds with other molecules. It also is unique in the sense that it can bond with other carbons, something most other elements cannot do.
No other element can do same job as copper as each element is unique .
A unique feature of the Lundehund breed of dog is the dog's six toes. This breed also has joints in its neck that other dogs do not have.
A good example may be mercury, which is a metal but is a liquid at room temperature, a unique feature not found in other metals.
An element is a substance that cannot be separated into different kinds of matter.If you could break down a sample of any element into its individual atoms,you would see that its atoms are all the same.Each element is made of only one kind of atom,and its atom differs from the atom of every other element. That difference is what makes the properties if each element unique.
Promethium is today the unique name for this chemical element.
A unique feature of the Apple G5 Mac Pro is the standard expansion slots for graphic adaptors and other expansion cards. The Mac Pro is the only Apple desktop that has this feature.
one of the major things that set rhode island apart from other colonies was the idea of religious toleration. they allowed nearly every religion to practice freely
phosphorus