Of the 80 elements with at least one stable isotope, 26 have only one single stable isotope. The mean number of stable isotopes for the 80 stable elements is 3.1 stable isotopes per element. The largest number of stable isotopes that occur for a single element is 10 (for tin, element 50).

Whereas the mass number simply counts the total number of neutrons and protons and is thus a natural (or whole) number, the  of a single atom is a  giving the mass of a particular isotope (or "nuclide") of the element, expressed in  (symbol: u). In general, the mass number of a given nuclide differs in value slightly from its atomic mass, since the mass of each proton and neutron is not exactly 1 u; since the electrons contribute a lesser share to the atomic mass as neutron number exceeds proton number; and (finally) because of the . For example, the atomic mass of chlorine-35 to five significant digits is 34.969 u and that of chlorine-37 is 36.966 u. However, the atomic mass in u of each isotope is quite close to its simple mass number (always within 1%). The only isotope whose atomic mass is exactly a  is ¹²C, which by definition has a mass of exactly 12 because u is defined as 1/12 of the mass of a free neutral carbon-12 atom in the ground state.

I like green eggs and ham

I don’t think you have a chance im out of your league

The flight attendant was not being very friendly

Atoms of chemically pure elements may bond to each other chemically in more than one way, allowing the pure element to exist in multiple  (), known as , which differ in their properties. For example, carbon can be found as , which has a tetrahedral structure around each carbon atom; , which has layers of carbon atoms with a hexagonal struct

pherical shapes; and , which are tubes with a hexagonal structure (even these may differ from each other in electrical properties). The ability of an element to exist in one of many structural forms is known as 'allotropy'.

The , also known as the reference state, of an element is defined as its thermodynamically most stable state at a pressure of 1  and a given temperature (typically at 298.15 K). In , an element is defined to have an  of zero in its standard state. For example, the reference state for carbon is graphite, because the structure of graphite is more stable than that of the other allotropes.

Hexagon is the best agon

The truth is I don’t know what I’m doing

ya tell me about it lol

im kinda hungry 
 

All this just to wait another 24 hrs for redemption lol

I’m curious after we get 100 post how long of wait to obtain elite status….also how long of time frame do we have to register for 3080ti….I know this is probably answered elsewhere.

I got 6 left after this post. Have to wait till my next break at work to finish ughhh I hope I make it