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Atom - the smallest unit of an element that maintains the chemical properties of that element; basic building block of matter
Boiling Point - temperature at which a liquid changes to a gas at a given pressure
Conservation- to have change in a chemical reaction but no net gain or loss of molecules
Chromatography- a method of separating a mixture made of color into the primary colors which made it
Decomposition- a type of reaction in which the complex reactant breaks down into simpler products
Ductility - the ability to be formed or pulled into a wire or tube
Electron- the tiny negatively charged particle found in the cloud of the atom
Element - a substance that cannot be separated or broken down into simpler substances by chemical means; all the same of type atoms
Endothermic - during a chemical reaction energy is absorbed by the molecules of the products.
Exothermic – during a chemical reaction energy is released
Heat - the energy transferred between objects that are at different temperatures
Ion- an atom or group of atoms that has a positive or negative electric charge from losing or gaining one or more electrons; occurs during bonding
Indicator- an organic compound used to indicate the presence of a chemical. It changes color to indicate the presence of____ Ex. Hydrion paper tells if acid or base, iodine if a starch is present, phenol red if CO2 is present.
Mass - amount of matter contained in a substance
Matter - anything that has mass and volume
Melting Point - the temperature and pressure at which a solid becomes a liquid
Malleability - able to be bended, shaped, or flattened or hammered flat
Motion - an object's change in position relative to a reference point
Neutron- the neutral particle of an atom-found in the nucleus.
Particles - a very small piece or part; a tiny portion or speck.
Phase - one of the four states or conditions in which a substance can exist: solid, liquid, gas, or plasma.
Proton- the positive particle of an atom found in the nucleus. Makes the element unique.
Pure Substance - a sample of matter, either a single element or a single compound, that has definite chemical and physical properties
Saturation - a solution that cannot dissolve any more solute under the given conditions
Solubility - the solubility to dissolve in another substance
Solute - in a solution, the substance that dissolves in the solvent
Solvent - in a solution, the substance in which the solute dissolves
Solution- a homogenous mixture in which a solute dissolves in a solvent
Synthesis- a chemical reaction in which simple reactants combine to form a more complex product(compound)
Volume - amount of space an object occupies
Mass - a measure of the amount of matter in an object
Crystal Pattern - a solid in which all the atoms are arranged in a regular, repeating pattern.
Evaporation - process in which liquid water changes to water vapor with the addition of energy.
Filtering - a porous material through which a substance is passed in order to separate the fluid from suspended particulate matter.
Heterogeneous - a mixture that is not mixed evenly and each component retains its own properties
Sifting - to separate and retain the coarse parts to remove lumps and large particles
Conductivity - property of metal and alloys that allow heat or electricity charges to pass through the material easily.
Metals - an element below and to the left of the stair-step line of metalloids; about 80% of the known elements are metals; metals are shiny, good conductors, low specific heat, high melting points, malleable, and ductile.
Model - a standard or example used for comparison.
Periodic Table - an arrangement of elements in order of increasing atomic numbers that demonstrates the periodic patterns that occur among the elements.
Physical Properties - a characteristic of a substance that can be observed without changing the identity of the substance
Reactivity - the ability of an atom or molecule to undergo a chemical reaction with another atom, molecule or compound.
Chemical bond - the "glue" that attracts and keeps atoms held together due to sharing of each atom's electrons
Chemical change - the process in which one or more substances are changed into one or more new substances
Chemical property - property that can be observed only when a substance is changed into a new substance
Precipitate - the solid that is formed as a result of a precipitation reaction
Closed System - the reactants and products in the reaction that are contained to reduce error
Law of Conservation of Mass - states that the total amount of mass and energy in the universe is conserved (does not change)
Products - materials present at the end of a reaction
Reactants - the starting materials in a reaction
Homogenous - solid, liquid or gas that contains two or more substances blended evenly throughout.
Mixtures - the physical combination of 2 or more substances; can be separated by physical means.
Molecule - consisting of one or more atoms held together by chemical forces; formed by bonding
Compound - a substance made of two or more different atoms
Density - the measure of mass of a substance per unit volume
Created by: Saba Aleem