Ch. 9 L. 5 Vocabulary

A way to show a chemical reaction, using symbols instead of words

• synthesis

• decomposition

• chemical equation

• replacement

states that during a chemical reaction, matter is not created or destroyed

• law of conservation of mass

• open system

• closed system

• chemical equation

matter can enter or escape to the surroundings

• chemical equation

• closed system

• reaction

• open system

matter does not enter or leave

• closed system

• chemical equation

• open system

• decomposition

a number placed in front of a chemical formula in an equation

• replacement

• subscript

• coefficient

• synthesis

when two elements in different compounds trade places

• coefficient

• replacement

• synthesis

• decomposition

compounds break down into simpler products

• synthesis

• replacement

• coefficient

• decomposition

two or more elements or compounds combine to make a more complex substance or product

• decomposition

• synthesis

• replacement

• coefficient