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Fish Sauce Flash
Chemistry Vocab
20
Science
8th Grade
03/13/2016

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Term
Atom
Definition
The smallest unit of an element that maintains the properties of that element.
Term
Particle
Definition
A small localized object to which can be ascribed several physical or chemical properties such as volume or mass.
Term
Element
Definition
A substance that cannot be separated or broken down into simpler substances by chemical means.
Term
Electron
Definition
A subatomic particle that has a negative charge.
Term
Proton
Definition
A subatomic particle that has a positive charge and that is found in the nucleus of an atom.
Term
Neutron
Definition
A subatomic particle that has no charge and that is found in the nucleus of an atom.
Term
Ion
Definition
A charged particle that forms when an atom or group of atoms gain or loses one or more electrons.
Term
Molecule
Definition
The smallest unit of a substance that keeps all of the physical and chemical properties of that substance.
Term
Compound
Definition
A substance made up of atoms of two or more different elements joined by chemical bonds.
Term
Mixture
Definition
A combination of two or more substances that are not chemically combined.
Term
Substance
Definition
Matter which has a specific composition and specific properties.
Term
Covalent Compounds
Definition
When two or more nonmetal atoms bond by sharing valence electrons.
Term
Ionic Compounds
Definition
A compound made of oppositely charged ions.
Term
Threshold
Definition
The magnitude or intensity that must be exceeded for a certain reaction, phenomenon, result, or condition to occur or be manifested.
Term
pH
Definition
A value that is used the express the acidity or basicity (alkalinity) of a system.
Term
Endothermic Reaction
Definition
A chemical reaction that requires heat.
Term
Exothermic Reaction
Definition
A chemical reaction in which heat is released to the surroundings.
Term
Solute
Definition
In a solution, the substance that dissolves in the solvent.
Term
Solvent
Definition
In a solution, the substance in which the solute dissolves.
Term
Solution
Definition
A homogenous mixture of two or more substances uniformly dispersed throughout a single phase.
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