Atom

• The simplest particle of an

element that retains all the

properties of that element.

• A subatomic particle with a single

unit of positive electric charge (+).

– One of the two types of

particles found in the nucleus of

an atom.

• A subatomic particle with a single

unit of negative electric charge ().

– These particles found outside

the nucleus of an atom.

– These particles are involved in

chemical bonding.

• A subatomic particle that has no

charge (is electrically neutral).

– One of the two types of

particles found in the nucleus of

an atom.

• The central core of an atom that

contains protons and neutrons .

• The number of protons in an

atom's nucleus.

• One of several forms of an

element, each containing the

same number of protons in their

atoms but a different number of

neutrons.

Radioactive Isotope

(Radio-Isotope)

• An isotope in which the nucleus

decays (breaks down) over time,

giving off radiation in the form of

matter and energy.

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Two or more atoms held together by covalent bonds.

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• A chemical bond that forms when two atoms share electrons.
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• Breaking of old and formation of new chemical bonds that result in new substances.

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• A compound or atom that is involved in a chemical reaction.
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• A compound or atom that is involved in a chemical reaction.
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New material created as a result of a chemical reaction.

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• A chemical reaction in which two different elements are bonded together forming a compound.
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• A + B AB
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•A chemical reaction in which a compound is broken down into its elements.

•ABA+B
–
The opposite of synthesis reaction.

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• A chemical reaction between an element and a compound which yields a different element and compound.
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• C + ABAC + B
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• A chemical reaction between an element and a compound which yields a different element and compound.
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• C + ABAC + B
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• A molecule in which opposite ends have opposite electric charges.
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• A bond created by the weak attraction of a slightly positive hydrogen atom to a slightly negative portion of another molecule.
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• The tendency of molecules of the same kind to stick to one another.
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• An attraction between unlike molecules.
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• The part of a solution that dissolves the other substance and is present in the greater amount.
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• The part of a solution that is dissolved and is present in a lesser amount.
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• A solution in which water is the solvent.
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• A compound that donates H+ ions to an aqueous solution and measures less than 7 on the pH scale.
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• A compound that removes H+ ions from an aqueous solution and that measures more than 7 on the pH scale.
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• A substance that maintains a fairly constant pH in a solution by accepting H+ ions when their levels rise and donating H+ ions when their levels fall.
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