8th Grade Science: Unit 02 Flashcards

Front

A representation of a chemical reaction using chemical symbols, numbers, and a symbol → is called a ________.

Back

chemical equation

Front

The rearrangement of atoms to form new substances with different properties is called a ________.

Back

chemical reaction

Front

The principle that matter is not created or destroyed, only rearranged, is known as the ________.

Back

law of conservation of mass

Front

The smallest particle of an element is called an ________.

Back

atom

Front

A change in matter that produces a new substance is called a ________.

Back

chemical change

Front

A ________ represents the type and number of atoms present in a particular substance.

Back

chemical formula

Front

A number placed in front of a chemical formula in a chemical equation that indicates the number of units (molecules or moles) of the substance involved in the reaction is called a ________.

Back

coefficient

Front

A substance composed of two or more different elements that are chemically combined is called a ________.

Back

compound

Front

A pure substance composed of the same type of atom throughout is called an ________.

Back

element

Front

The simplest unit of a chemical compound that can exist, formed when two or more atoms combine chemically, is called a ________.

Back

molecule