What does Pm on the periodic table stand for?

Answer 1

"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.

Answer 2

It is a measurement called the picometer. Pico- is the SI prefix that means a factor of 10-12. So one meter would be .000000000001 picometers.

Answer 3

It is a measurement called the picometer. Pico- is the SI prefix that means a factor of 10-12. So one meter would be .000000000001 picometers.

Answer 4

If you meant ppm, it refer to the concentration of a solution in the units parts per million.

1 ppm is approx. 1 mg of a solute dissolved in 1L of the solvent.

Answer 5

pm is picometre. one picometre is 1 x 10-12 metres, 0.000 000 000 001 metre.

Answer 6

Promethium