what is the standard of atomic mass?

Question

thx a lot~

Answer 1

1 atomic mass unit = 1.66053886 × 10^-27 kilograms. The unified atomic mass unit (u), or dalton (Da), is a small unit of mass used to express atomic and molecular masses. It is defined to be 1⁄12 of the mass of one atom of carbon-12.

(Read ^ as "to the power of" here, sorry.)

Answer 2

1/12 the mass of a Carbon -12 atom

Answer 3

The mass of Carbon 12,
one unit of mass is 1/12 of carbon 12

Answer 4

atomic mass the mass of a single atom, commonly expressed in atomic mass units (amu). a huge style of the mass of an atom is concentrated indoors the protons and neutrons contained indoors the nucleus. each and each proton or neutron weighs a pair of million amu, and subsequently the atomic mass is in lots of cases very on the brink of to the mass decision (finished style of protons and neutrons indoors the nucleus). Atoms of an isotope of a ingredient all have the comparable atomic mass. Atomic lots are commonly desperate by utilising mass spectrography (see mass spectrograph). they have been desperate with super relative accuracy, yet their absolute fee is a few distance much less particular. At one time, the lightest atom improve into assigned a mass of a million amu and the mass of the quite a few atom improve into expressed in terms of this known. on the instant atomic mass units are defined in terms of the 12C isotope, that's assigned a mass of precisely 12.000... amu.

Answer 5

Atomic Kitten i know.......Atomic mass?

Answer 6

It is a very high standard indeed.