Vocabulary #2 Element and Atoms

element:a substance that cannot be broken down any futher into anything simpler.
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atom:the smallest particle of an element that has the same chemical properties as the element.
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nucleus:an atom dense center, where most of its mass is.
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electron:a negatively charged particle that moves around an atoms nucleus.
proton:a positively charged particle inside an atoms nucleus.
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neutron:a particle wirh no charge inside an atoms nucleus.
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atomic number:the number of protons in an atom.
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metal:any of a group of elements that conduct heat and electricity,is shiny and bendable.
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Vocabulary #1

matter:any solid,liguid,or gas.

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mass:amount of matter in an object.
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volume:the amount of space an object takes up.
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density:the amount of mass in a certain volume of material.
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physical property:a property that can be observed without changing the identify of a substance.
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physical change:a change in size,shape,or state without forming a new substance.
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solution:a mixture of one substance dissolved in another so that properties are the same throughout.
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chemical change:a change in matter that produces a new substance with different properties from the original.
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