lesson 10 relative atomic mass Flashcards
1
Q
what does ‘abundance of each isotope mean’
A
how common each isotope is
2
Q
what is the smaller number in an element called (bottom number)
A
atomic number
3
Q
what is the bigger number in an element called (top number)
A
mass number
4
Q
the bottom number of an element is the number of what
A
protons
(electrons)
5
Q
the top number of an element is the number of what
A
neutrons
6
Q
what’s an isotope
A
atoms of the same element with a different number of neutrons
7
Q
what are ions
A
atoms which have an overall charge
8
Q
why do atoms have an overall charge
A
because ions have lost or gained electrons
9
Q
positive ions have what
A
lost electrons
10
Q
negative ions have what
A
gained electrons
