Atoms and elements

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atoms have a small nucleus surrounded by electrons

Elements consist of one type of atom only

Nucleus

the nucleas is the middle of the atom

it contains protons and neutrons

almost the whole mass of the atom is concentrated in the nucleas

its tiny compared to the atom as a whole

Electrons

move around the nucleus in shells

theyre tiny but their paths cover lots of space

electron shells explain the whole of chemistry

Atoms

different numbers of protons neutrons and electrons

its the number of…

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