391423
Description
Mind Map by emilywebber98, updated more than 1 year ago
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Created by emilywebber98
over 10 years ago
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Masses of atoms
and Moles
- Mass of Atoms
- The Relative mass
of protons and
neutrons = 1
- Atomic No. = No.
Protons = No.
Electrons
- Mass No. = No.
protons +No. of
neutrons
- No. Neutrons = mass no. - atomic no.
- No. Neutrons = mass no. - atomic no.
- Isotope
- Atoms of the same
element with different
number of neutrons
- therefore different mass number
- therefore different mass number
- same no. of protons and electrons
- Atoms of the same
element with different
number of neutrons
- The Relative mass
of protons and
neutrons = 1
- RAMs and Moles
- We compare the masses of
atoms by comparing them relative
to atoms of carbon 12
- One Mole of any substance
is its RAM in grams
- Work out the RAM of a compound
by adding up the RAMs of the
elements in it
- The ratio is shown by the
elements formula
- eg. H2 + O -> H2O
(1x 2) + 16 -> 18
- The ratio is shown by the
elements formula
- RAM = Relative
formula mass
- We compare the masses of
atoms by comparing them relative
to atoms of carbon 12
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