"AM" stands for "ante meridian", while "PM" stands for "post meridian".
As the Earth spins, the Sun passes over your line of longitude - your "meridian" - at noon. "Ante" is Latin for "before", and "post" is derived from the Latin for "after". So "AM", before the Sun passes your longitude at noon, and "PM" means after the Sun passes your meridian at noon.
In other contexts, PM can stand for other things, like Prime Minister.
No, the symbol "H" stands for Hydrogen on the periodic table. The symbol "He" stands for Helium on the periodic table.
ES stands for Einsteinium in the Periodic table. It is named after the physicist Albert Einstein.
"Br" stands for Bromine in the periodic table.
The "P" on the periodic table stands for "Period." Periods are the horizontal rows on the periodic table that indicate the number of electron shells present in an atom of an element.
Pe does not stand for any element in the periodic table. Each element is represented by a unique symbol, typically consisting of one or two letters.
Pm stands for Promethium in the periodic table. It is a rare earth element with the atomic number 61.
N stands for Nitrogen on the periodic table.
Beryilium
there is no such element
iodine
iodine
Sn stands for the element tin in the periodic table.
No, the symbol "H" stands for Hydrogen on the periodic table. The symbol "He" stands for Helium on the periodic table.
Argon is what Ar stands for on the Periodic Table of elements.
potassium
it is fluorine
Beryllium (Be)