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atomic theory

7th grade science

TermDefinition
electron a stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
neutron a subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
proton a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
element each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter.
atom the basic unit of a chemical element.
malleable can be smashed without crumbling
luster shiny
ductile can be drawn into thin wire
corrosive rust
density the mass in the volume
Alkali Metals Metals that are highly reactive to water
Alkali Earth Metals Reacts with halogens and is reactive to water
Noble gases Gases that have slightly reactive
Created by: NEspinoza
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