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7243341
Atoms
Descrição
Everything you need to know about atoms for the 1st Semester Exam.
Sem etiquetas
science
8th grade
Mapa Mental por
Joshua Gallien
, atualizado more than 1 year ago
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Criado por
Joshua Gallien
mais de 7 anos atrás
11
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Resumo de Recurso
Atoms
Electrons
Negative Charge
Outside Nucleus
Move Around
Nuclues
Contain Protons And Nuetrons
Don' Move Around
Democritus
Discovered the atom
Greek Meaning- "Can't be divided"
Said that all things are made of atoms
Different matter is made of different atoms
John Dalton
Said that you can't see atoms
Different matter is made of different atoms
His ideas became known as "Atomic Theory of Matter"
Atomic Number
Tells the number of protons in the nucleus
If neutral, it tells you number of electrons as well
Top number
Atomic Mass Number
Tells how many protons added to the number of neutrons
Can subtract from the Atomic Number to find the number of just the neutrons
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