2006-09-17 07:10:31 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Other - Science
im in 9th grade
and i dont have a textbook at home
2006-09-17 07:13:26 · update #1
Its the mass of 1 mole of the element. 1 mole of an element is equal to 6.02 x 10^23 atoms of that element. 6.02 x 10^23 is called Avogadro's number.
2006-09-17 07:12:07 · answer #1 · answered by Anonymous · 1⤊ 0⤋
The relative atomic mass of any element is the sum of the masses of the element's protons and neutrons, less the equivalent mass of the binding energy, and is expressed as a dimensionless number. As far as I know, it must be determined empirically for each isotope(see matahari's answer). Because an element may have more than one stable or long-lived isotopes the atomic mass of the element is usually given as the weighted mean of all these isotopes.
The current reference point for all atomic masses is Carbon 12, C12. It's mass is defined as the integer 12.
You can approximate it by ignoring the binding energy and multitude of isotopes.
2006-09-17 14:25:11 · answer #2 · answered by Helmut 7 · 0⤊ 0⤋
Ermm Atoms - Electrodes, Neutrons, Protons
2006-09-17 14:13:10 · answer #3 · answered by ζόε♥ 2 · 0⤊ 2⤋