subatomic particles Flashcards
1
Q
protons
A
positive charge, found in nucleus, = atomic number
2
Q
neutrons
A
neutral charge, found in nucleus, = atomic mass - protons
3
Q
electrons
A
negative charge, moves around nucleus, = protons
4
Q
atomic number
A
= amount of protons, always the same for each element
5
Q
mass number
A
= protons + neutrons
6
Q
amount of electrons on each shell
A
1st = 2, 2nd = 8, 3rd = 8, 4th = 32.
7
Q
valence shell
A
outermost shell
8
Q
Ion formed when
A
electrons are gained or lost
9
Q
cation
A
postively charged ion (lost electron)
10
Q
isotope
A
where the amount of protons are not equal to the amount of neutrons
