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Ch 3 - Matter & Ener

Chemistry I

QuestionAnswer
solid The particles are tightly packed.
The particles do not move around.
liquid The particles are close together.
The particles vibrate move
gas The particles are very separated.
The particle vibrate and move quickly.
Liquid can be poured and take on the shape of their container. Has mass and volume.
gas A state of matter that has no definite shape or volume. Has a high kinetic energy.
Matter anything that takes up space and has mass
atoms basic particle from which all elements are made
element cannot be broken down into any other substance
molecule 2 or more atoms bonded (same or different)
compound 2 or more different atoms bonded together in a set ratio
mixture 2 or more substances mixed together but NOT chemically bonded
homgeneous mixture mixture in which substances are evenly distributed (you cannot see the different parts)
heterogeneous mixture mixture in which you can see the different parts
Precipitate A solid product that may form when chemicals in two liquids react
Reactants The substances present at the beginning of a chemical reaction
Exothermic reaction A reaction in which energy is released
Endothermic reaction A reaction in which energy is absorbed
Chemical reaction Changes the way in which atoms are arranged by causing bonds between atoms to break and new bonds to form between different atoms
Law of conservation of mass The law that states the mass of reactants is always equal to the mass of the products
Products The substances formed by a chemical reaction
Physical Property can be observed and measured without changing the kind of matter being studied
Melting Point temperature at which a substance changes from a solid to a liquid
Boiling Point temperature at which a substance changes from a liquid to a gas
Chemical Property can be observed when substances undergo a change in composition; the ability to react (combine) with another substance
Ability to Burn involves a substance reacting with oxygen quickly to produce light and heat
Ability to Rust involves a substance (iron) reacting slowly with oxygen
Physical Properties of Matter Melting Point; Boiling Point; Density; Color
Malleable
Chemical Properties of Matter Ability to Burn; Ability to Rust
physical change A type of change that involves the physical properties of a substance
chemical change Process by which substances are changed into different substances with different properties
physical change A change of the state of matter (solid
homgeneous mixture mixture in which substances are evenly distributed (you cannot see the different parts) and are known as solutions
element -cannot be broken down into any other substance
- Made up of the same type of atoms (homogeneous)
-listed and classified on periodic table
-pure substance
compound A substance made up of atoms of two or more different elements joined by chemical bonds
mixture 2 or more substances mixed together but NOT chemically bonded
heterogeneous mixture mixture in which you can see the different parts
matter anything that has mass and takes up space (volume)
Solution a homogeneous mixture of two or more substances evenly dispersed throughout
Pure Substance A substance with a fixed composition. Made of one type of particles.
Compound A substance made up of atoms of two or more different elements joined by chemical bonds
water compound
dry ice compound
sugar compound
Bismuth element
salt compound
milk mixture
Uranium element
crystalline iron
Amorphous Solids A solid made up of particles that are not arranged in a regular pattern
Crystalline Solids A solid that is made up of crystals in which particles are arranged in a regular
Amorphous coal
Created by: droesener