2006-10-15 10:09:27 · 5 answers · asked by Stacey C 1 in Education & Reference ➔ Homework Help
The Atomic Number of an atom is the number of protons in the nucleus of that atom.
The Mass Number of an atom is the sum of the number of protons and neutrons.
Mass Number = Number of Protons + Number of Neutrons.
So your answer should be 34 + 40 =74
Hope this will help!!!!Good luck with the school work dear.
2006-10-15 10:19:09 · answer #1 · answered by Just enquiring/ inquiring 4 · 0⤊ 1⤋
o0o0 man chemistry is easy
74 dahhhhh
u add the proton and neutrons
the mass is also to electrons an atom has
this is basic chem
2006-10-15 17:20:10 · answer #2 · answered by jayda 3 · 0⤊ 1⤋
74...just add the protons and neutrons...but don't worry about the electrons because they are so small that their mass is insignificant.
2006-10-15 17:17:40 · answer #3 · answered by Shelby 2 · 0⤊ 1⤋
74...you just add the protons and the neutrons together!!
2006-10-15 19:53:19 · answer #4 · answered by Allie H. 5 · 0⤊ 1⤋
74
All u gotta do is jus add e no.of protons and electrons.
2006-10-16 01:31:16 · answer #5 · answered by fabu_hotchic 2 · 0⤊ 1⤋