Biochemistry: The Chemistry Of Life

the basic unit of matter

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NGSS.MS-PS1-1

smallest fragment of matter, which means "unable to be cut"

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NGSS.MS-PS1-1

smallest fragment of matter, which means "unable to be cut"

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NGSS.MS-PS1-1

the structure in a cell that contains the chromosomes and the center of an atom

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NGSS.HS-LS3-1

mass. = about 1 amu

positively charged particles (+)

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NGSS.HS-PS1-7

mass. = about 1 amu

no charge at all (neutral)

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NGSS.HS-PS1-8

negatively charged particles (-)

in constant motion

around the nucleus

2-8-8 rule

attracted to the positively charged nucleus

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NGSS.HS-PS1-1

a pure substance that consists entirely of one type of atoms. more than 100 of this are known. they are represented by one- or two-letter symbols

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NGSS.HS-PS1-1

the number of protons in the nucleus of an element, never changes for an element

atoms of an element which have different numbers of neutrons. some are radioactive and scientists use them as tools

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NGSS.HS-PS1-8