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science terms

study terms

QuestionAnswer
acid a chemical substance that neutralizes alkalis, dissolves some metals, and turns litmus red; typically, a corrosive or sour-tasting liquid of this kind.
alloy a metal made by combining two or more metallic elements, especially to give greater strength or resistance to corrosion.
base any substance that in water solution is slippery to the touch, tastes bitter, changes the colour of indicators
catalyst a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
chemical change a change of materials into another, new materials with different properties and one or more than one new substances are formed. It results when a substance combines with another to form a new substance (synthesis or either decomposes to form more substan
chemical formula n expression that shows the elements in a compound and the relative proportions of those elements.
chemical property a characteristic of a particular substance that can be observed in a chemical reaction.
coefficient A number placed in front of a formula to balance a chemical equation.
compound any substance composed of identical molecules consisting of atoms of two or more chemical elements
concentrated a relatively large quantity of substance present in a unit amount of a mixture.
covalent bond he interatomic linkage that results from the sharing of an electron pair between two atoms.
dependent variable the data being collected in a experiment.
dilute he interatomic linkage that results from the sharing of an electron pair between two atoms.
electron dot diagram A way of representing atoms or molecules by showing electrons as dots surrounding the element symbol
element a representation of the valence electrons of an atom that uses dots around the symbol of the element.
exothermic An exothermic reaction is defined as a reaction that releases heat and has a net negative standard enthrall change.
endothermic chemical reactions in which the reactants absorb heat energy from the surroundings to form products.
heterogeneous mixture Heterogeneous refers to a structure with dissimilar components or elements, appearing irregular or variegated.
homogeneous mixture consisting of parts all of the same kind.
independent variable the variable that impacts the data being collected (dependent variable)
insoluble incapable of being dissolved.
ionic bond type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.
law of conservation of mass discovery that mass is neither created nor destroyed in chemical reactions.
mixture a substance made by mixing other substances together.
molecule a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
neutralization The reaction between an acid and bases.
PH A measure of how acidic or basic a substance or solution is.
phase changes a change in the state of matter of a sample.
physical change a type of change where the physical properties of matter change.
physical property any property that is measurable, whose value describes a state of a physical system.
polarity when an entity contains two distinct and opposite poles that can either attract or repel each other.
precipitate an insoluble solid that emerges from a liquid solution.
soluble degree to which a substance dissolves in a solvent to make a solution
pressure force per unit area of surface;
product a substance that is formed as the result of a chemical reaction.
rate of reaction the speed at which a reaction occurs.
reactant substance that changes when it is combined with another substance in a chemical reaction.
solubility the amount of solute that dissolves in a given amount of the solvent.
soluble the ability of a solute to dissolve in a solvent.
solution a homogeneous mixture of two substances that form one substance .
solvent the substance that dissolves the solvent.
subscript numbers that come after a symbol and below.
temperature a quantitative measure of how hot or cold something is.
Created by: csantana27
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