mass number = protons + neutrons
neutral atom: atomic number = # of protons = # of electrons
• atomic number = 10
• # of protons = # of electrons = 10
• mass number = 22
What are the differences in the compositions of the following pairs of atomic nuclei?
2210Ne , 3818Ar
a) 3818Ar has eight more protons and eight more neutrons than 2210Ne.
b) 3818Ar has sixteen more protons and ten more neutrons than 2210Ne.
d) 3818Ar has eight more protons and twelve more neutrons than 2210Ne.
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