PMT Flashcards
What is atomic number?
The number of protons present in the nucleus of an atom
What is mass number?
The total number of nucleons (protons and neutrons) present in the nucleus of an atom
What is relative atomic mass?
The mean weighted mass of an atom of an element compared with 1/12th the mass of an atom of carbon-12
What is relative molecular mass?
The mean weighted mass of a molecule compared with 1/12th the mass of an atom of carbon-12
What is relative formula mass?
The sum of the mean weighted masses of all atoms in the formula of a compound compared with 1/12th the mass of an atom of carbon 12
What is relative isotopic mass?
The mars of an atom isotope compared with 1/12th the mass of an atom of carbon-12
What is the mole?
A mole = the amount of substance containing as many particles as there are atoms in 12g of carbon-12
1 mole = 6.02 x 10^23 items = Avogadro constant
