2.1.3 Amount Of Substance - The Mole Flashcards
What’s the mass and charge of protons
Mass - 1
Charge - +1
What’s the mass and charge of electrons
Mass - 1/1840
Charge - -1
What’s the mass and charge of neutrons
Mass - 1
Charge - 0
What’s the mass number
Another name for it
Where is it
Number of protons and neutrons
(Nucleon number)
Bottom number
What’s the atomic number
Another name for it
Where is it
Number or protons
(Proton number)
Top number
Why are protons and neutrons the only ones that contribute to mass number
They only have a mass
What’s the relative atomic mass (Ar)
The weighted mean mass of 1 atom of an element relative to 1/12 of the mass of an atom of 12C
Where’s the relative atomic mass on the periodic table
It’s the mass number of an element
What’s the relative molecular mass (just need to know what it is)
The weighted mean mass of 1 molecule of an element/compound relative to 1/12 the mass of an atom of 12C
What’s the value of Avogadro’s number
6.02 x 10(23)
What’s 1 mole
Why is this called this
6.02 x 10(23)
Called mole for convenience
What’s 1 mole (6.02 x 10(23) the exact number if atoms of an element needed for
A mass (in g) equal to its mass number
Definition of 1 mole
The amount of substance that contains as many particles as there are atoms in exactly 12g of carbon-12
What’s the equation for number of moles
Moles = mass (g)/Mr (gmol-1)
What can u work out first when mole equations involve balanced equations
Mr from periodic table
