Study Guide for Chemical Reactions & Energy Vocabulary Flashcard

Front

What is the term for the value you get when you add up all the numbers in a set and then divide by how many numbers there are?

Back

average

Front

What is the smallest particle of an element that can exist, the basic building blocks for all matter?

Back

atom

Front

What is the term for the number of protons in the nucleus of an atom; determines what element the atom is?

Back

atomic number

Front

What is the term for the change that happens when two or more substances act on each other to form a different substance?

Back

reaction

Front

What is a chain reaction of effects, where one change leads to others called?

Back

cascading consequences

Front

What is a chemical that makes a chemical reaction happen faster called?

Back

catalyst

Front

What is a change in how the atoms of one or more substances are arranged; it leads to the formation of a new substance and is usually not reversible called?

Back

chemical change

Front

What are symbols and numbers to show the types and amounts of atoms in a molecule or compound called? Example: H2O for water.

Back

chemical formula

Front

What is the process called when chemicals combine to cause new substances to be formed?

Back

chemical reaction

Front

What is it called when two or more objects or particles hit each other?

Back

collision