atoms and elements

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10 Terms

1
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elements

made up of atoms, substances that cannot be broken down into simpler substances by ordinary chemical methods

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four elements that make up body

oxygen, carbon, hydrogen, nitrogen

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atoms

what give each element its particular physical and chemical properties

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protons

positive charge 1 amu

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neutrons

no charge 1 amu

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electrons

negative charge no weight

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protons and neutrons are located in

nucleus

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atomic number

number of protons in nucleus

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mass number

total number of protons and neutrons in nucleus

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isotopes

atoms that contain same number of protons but differ in the number of neutrons they contain