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Homework answers / question archive / Element Atomic atomic atomic number of number number of name symbol number mass protons of neutrons electrons 1
Element Atomic atomic atomic number of number number of
name symbol number mass protons of neutrons electrons
1. He
2.krypton
3. 82
4. 31
5. 35
6. 28
7. Gd
8.Palladium
9. 50.942
10.Beryllium
11. 22
12. 50
13. Ag
14.Yttrium
15. 89
16.Neon-18
17.Oxygen-15
18.Nitrogen-15
19.Carbon-15
please see the attached file.
Atomic Mass = # Protons + # Neutrons
Atomic number = # Protons = # Electrons
References:
http://environmentalchemistry.com/yogi/periodic/atom_anatomy.html
http://www.webelements.com/
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