quantitative chemistry Flashcards
1
Q
whats the atomic number
A
is the number of protons in ant atom
2
Q
whats the mass number
A
is the number of protons and neurons in any atom
3
Q
what are isotopes
A
elements that have the same atomic number but different atomic mass
4
Q
whats the mole
A
is the relative atomic (or formula) mass written in grams
5
Q
whats the empirical formula
A
is the simplest ratio of numbers of atoms in a compound
6
Q
whats the molecular formula
A
is the number of atoms in one formula
7
Q
whats the percentage mass of an element (in a compound)
A
mass of element/total mass of compound
8
Q
what does Ar mean
A
RAM. relative atomic mass
9
Q
what does Mr mean
A
relative formula mass
