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Slide 1

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AS Revision PowerPoint…read more

Slide 2

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Atomic Structure
Amount of Substance
Introduction to Organic
Alkanes…read more

Slide 3

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Fundamental Particles
Protons, Neutrons and Electrons
Mass Number and Isotopes
Electron Arrangement…read more

Slide 4

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Atoms are the fundamental building blocks of matter.
However, even atoms are constructed of smaller, sub-
atomic particles.
The fundamental sub-atomic particles are protons,
neutrons and electrons. The protons and neutrons are
held together by strong nuclear binding forces in the
nucleus of the atom. The electrons may be considered
to be tiny particles that exist in regions of space
known as orbitals around the atom.…read more

Slide 5

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Mass Charge
Proton 1 +1
Neutron 1 0
Electron 1/1836 -1…read more

Slide 6

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Isotopes are atoms of a specific element that have a definite number
of neutrons and consequently a different mass. In effect all atoms are
isotopes of one element or another.
Most elements have several isotopes, some of which are stable, and
others that spontaneously break apart releasing radioactivity.
The percentage of an isotope occurring in a natural sample of an
element is called its natural abundance. The natural abundance of
each isotope on the earth are usually very similar wherever the sample
is obtained.
The 'relative abundance' of an isotope means the percentage of that
particular isotope that occurs in nature.
Most elements are made up of a mixture of isotopes.…read more

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