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15 Cards in this Set

  • Front
  • Back
matter is anything that has mass and take up space.
Chemistry is the study of the properties of matter and how matter changes.
A substance is a single kind of matter that is pure, it always has a specific makeup-or compostion-and a specific set of properties.
Two properties of matter are?
Every form of matter has two kinds properties-physical properties and chemical properties.
Physical property
a physical property is a characteristic of a pure subtance that can be observed without changing it into another substance.
Chemical property
A chemical property is a characteristic of a pure substance that describes its abilty to change into different substances.
An element is a pure substance that cannot be broken down into any other substance ny chemical or physical means.
Simple Substances
Elements are simple substances.
an atom is the basic particle from which all elements are made.
Chemical bond
a Chemical bond occurs when atoms combine because there is a force of attraction between the two atoms.
Atoms combine into molecules-which are groups of two or more atoms held together by chemical bonds.
A pure substance made of two or more elements chemically combined in a set ratio.
Chemical formula
represents a compound by showing the elemnts in the coumpiund and the ratio of the atoms.
Chemically combined compounds
When elemnts are chemically combined, the form coumpounds having properties that are different from those of the uncombined elements.
Made of two or more substances-elements, compounds, or both-that are together in the same place but are not chemically combined.