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atomic
The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. It is identical to the charge number of the nucleus. In an uncharged atom, the atomic number is also equal to the number of electrons.
The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom. Since protons and neutrons have approximately the same mass (and the mass of the electrons is negligible for many purposes) and the mass defect of nucleon binding is always small compared to the nucleon mass, the atomic mass of any atom, when expressed in unified atomic mass units (making a quantity called the "relative isotopic mass"), is within 1% of the whole number A.
Atoms with the same atomic number but different neutron numbers, and hence different mass numbers, are known as isotopes. A little more than three-quarters of naturally occurring elements exist as a mixture of isotopes (see monoisotopic elements), and the average isotopic mass of an isotopic mixture for an element (called the relative atomic mass) in a defined environment on Earth, determines the element's standard atomic weight. Historically, it was these atomic weights of elements (in comparison to hydrogen) that were the quantities measurable by chemists in the 19th century.
The conventional symbol Z comes from the German word Zahl meaning number, which, before the modern synthesis of ideas from chemistry and physics, merely denoted an element's numerical place in the periodic table, whose order is approximately, but not completely, consistent with the order of the elements by atomic weights. Only after 1915, with the suggestion and evidence that this Z number was also the nuclear charge and a physical characteristic of atoms, did the word Atomzahl (and its English equivalent atomic number) come into common use in this context.
Selling off a chunk of my .308
3 Atomic 168gr Match. $75 each 1 SOLD
1 Atomic 175gr Match HP BT. $80
21 PMC X-Tac 147gr $18 each
10 Freedom Munitions 147gr FMJ $14each SOLD
10 PMC Bronze 147gr FMJ-BT $18each
10 Federal 150gr FMJ BT $18 each
26 PPU 145gr FMJ $15 each SOLD
23 M80 ball $18each
7...
I've got a sealed box of 100 Atomic 168 grain Nosler Custom Competition hollow point boat tail ammo (308). I'd like to trade this 1-1 for hunting ammo, however, if you have nicer ammo, I'm willing to discuss other ratios. I'd prefer 165-180gr.
Let meet know what you've got.
Prefer to meet...
I am selling all my 308 Win ammo since unexpectedly I am left without any 308 Win rifle. I got 164 rounds of factory ammo that I purchase from MidwayUS in the last 2 months. I am asking only $120 cash. This is probably the best deal for 308 Win ammo that one can get nowadays. The 308 Win ammo...
Snagged these awhile back
Trade 3 for 1 for .223
4-1 x39
4-1 9mm
I haven’t shot the .223 but the .308 is super accurate
or make a trade offer
it’s a specialty item ......
I have a .50 cal ammo can with 360 rounds of match grade and decent quality practice ammo.
A cash sale is preferred, or trade towards quality/match grade .223/5.56 ammo or decent/quality 9mm FMJ or HP.
OR, maybe you have something else to trade that I can't resist? Please feel free to PM offers...