topic 1a - atoms, elements, compounds and mixtures (2. elements) Flashcards
1
Q
what is an element?
A
if a substance only contains one type of atom it’s called an element. smallest part of an element is an atom.
2
Q
what is the bottom number of an element called
A
atomic number
3
Q
what is the top number of an element called
A
mass number
4
Q
how to figure out how many neutrons are in an element
A
mass number - atomic number
