atomic number and mass number Flashcards
1
Q
which is the atomic number?
A
the smaller number
2
Q
what does the atomic number tell us?
A
number of protons in element
3
Q
what is the larger number on an element?
A
mass number
4
Q
what does the mass number tell us?
A
number of protons and neutrons added together
5
Q
what are isotopes?
A
atoms of same element with different number of neutrons
6
Q
what are ions?
A
atoms with an overall charge as they have lost or gained electrons
7
Q
what charge does an ion have if gained electron?
A
negative
8
Q
what charge does an ion have if lost electrons?
A
positive
