1.1 Elements of Life

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1.1 Elements of Life
Atomic Structure
Atoms are made of three types of sub-atomic particles ­ protons, neutrons and electrons.
Protons and neutrons form the nucleus of the atom and electrons move around it.
The nucleus is tiny in comparison to the space occupied by the electrons.
Particle Mass on a relative Charge relative to Location in atom
atomic scale neutron
Proton 1 +1 In nucleus
Neutron 1 0 In nucleus
Electron 0.00055 -1 Around nucleus
History of the Atom
Nuclear Symbols

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Nuclear symbols identify the mass number and the atomic number as well as the letter
symbol for the element they represent.…read more

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Mass Spectrometry
Sample Inlet ­ Sample is vaporised
Ionisation chamber ­ Sample bombarded with electrons.…read more

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