Science 8th

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18 Terms
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Atom

Smallest particle of an element

<p>Smallest particle of an element</p>
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atomic number

the number of protons in the nucleus of an atom

<p>the number of protons in the nucleus of an atom</p>
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atomic mass

Number of protons and neutrons

<p>Number of protons and neutrons</p>
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Proton

positively charged particle

<p>positively charged particle</p>
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Neutron

A small particle in the nucleus of the atom, with no electrical charge

<p>A small particle in the nucleus of the atom, with no electrical charge</p>
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Electron

negatively charged particle

<p>negatively charged particle</p>
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Enzyme

A type of protein that speeds up a chemical reaction in a living thing

<p>A type of protein that speeds up a chemical reaction in a living thing</p>
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Substrate

Reactant molecule which binds to enzyme

<p>Reactant molecule which binds to enzyme</p>
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active site

The part of an enzyme or antibody where the chemical reaction occurs.

<p>The part of an enzyme or antibody where the chemical reaction occurs.</p>
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Amu unit

Amu stands for atomic mass unit and is used to indicate mass on an atomic or molecular scale

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akaline earth metals

elements belonging to group two on the periodic table. They are less reactive and harder than alkali metals.

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Akali Metals

Group 1A, excluding Hydrogen. Highly reactive.

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reaction

process of molecular change

<p>process of molecular change</p>
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Reactivity

The ease and speed with which an element combines, or reacts, with other elements and compounds.

<p>The ease and speed with which an element combines, or reacts, with other elements and compounds.</p>
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Reactants

elements or compounds that enter into a chemical reaction

<p>elements or compounds that enter into a chemical reaction</p>
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Heterotroph

An organism that cannot make its own food.

<p>An organism that cannot make its own food.</p>
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Autotroph

An organism that makes its own food

<p>An organism that makes its own food</p>
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Photosynthesis

Plants use the sun's energy to convert water and carbon dioxide into sugars

<p>Plants use the sun&apos;s energy to convert water and carbon dioxide into sugars</p>
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