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A particle type of matter that has the same properties, such as wood, plastic, water or air
Substance
A tiny part of matter
Particle
The center of an atom
Nucleus
A substance madre entirely of one kind of atom, like hydrogen or helium
Element
The smallest part of matter that has all the properties of its element
Atom
Two or more atoms connected together
Molecule
Positive-charged particle in the atom´s nucleus
Proton
Particle without charge in the atom´s nucleus
Neutron
Negative-charged particle found in the outer shells of an atom´s nucleus
Electron
A table that organized all elements on earth
Periodic table