Expire Worthless is when options enter expiration out of the money and expire without any remaining value. Expiring worthless is one of the most common terms used in options trading. Options expire worthless whenever they go into expiration out of the money.
A single molecule of water consists of three atoms. H2O is built from a single atom of oxygen that is single-bonded with two atoms of hydrogen.
2 Hydrogen atoms and 1 Oxygen atom make up 1 water molecule. Since there is 1 atomic mass unit in 1 atom of H, and 16 a.m.u. in 1 atom of O, so. amount of H in water molecule is 2 X 1 = 2 a.m.u. amount of O in water molecule is 16 a.m.u. % of H = 2/18 X 100 = 11.11 approx.