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Creado por Mahmud Sayid
hace más de 8 años
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THE PERIODIC TABLE OF THE ELEMENTS
WHAT ARE ATOMS ?
What are atoms and molecules ?
How does an atom become charged ?
What is matter ?
What is matter made of ?
What are atoms made of ?
What is a proton ?
are proton,neutron, in the nucleus?
What is an Electron ?
What is a nucleus ?
Nucleus