25.1 Atoms Flashcards
1
Q
atom
A
smallest unit of any element
2
Q
nucleons
A
protons + neutrons
3
Q
how do you know the # of protons?
A
same as atomic number (Z)
4
Q
how do you know # of electrons?
A
neutral atom: same as atomic # (Z)
ion: subtract or add to Z
5
Q
how do you know the # of neutrons?
A
atomic mass (A) - atomic number (Z)
6
Q
does the # of protons differ for atoms of the same element
A
no, change atomic number (Z) will change it to a different element altogether
