+- Forums (https://askaluminium.com)
+-- Forum: My Category (https://askaluminium.com/forumdisplay.php?fid=1)
+--- Forum: aluminium faq (https://askaluminium.com/forumdisplay.php?fid=2)
+--- Thread: What is the atomic weight of aluminium? (/showthread.php?tid=20379)
What is the atomic weight of aluminium? - aadaasdark8072 - 06-28-2019
Atomic mass of any element ( except Hydrogen whose atomic is 1u ) is mostly (roughly) double of its atomic number ( for elements with lower atomic numbers as I have seen ).
Atomic number of Al is 13
and, its atomic mass is (roughly its double + 1 i.e. ) 27 u
RE: What is the atomic weight of aluminium? - Keganhirl - 06-28-2019
The atomic weight of Aluminium is 26.9813 but for convenience we take it as 27.
It can also be stated as follows:
The number of neutrons in Al is 14 i.e. n = 14
The number of protons in Al is 13 i.e. p = 13
Thus, Atomic Mass (A) = n + p = 14 + 13 = 27.