Completar frases ATOMSVersión en línea ATOMS: PROTONS, NEUTRONS AND ELECTRONS por MARIA DEL MAR CURCHO ZARAGOZA 1 118 mass protons protons nucleus electric negative neutral charge shell thousand mass Electrons have a electric charge and very small . Protons have the same as electrons , but positive , and their mass is about two times grater . Neutrons are particles with no charge . They have a similar to protons . Neutrons and protons are in the of the atom . The electrons are moving in the of the atom . The atoms are because they have the same number of and electrons . The number of neutrons is similar to the number of , but not necessarily the same . There are different kinds of atmoms .
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