Chemical reactions Flashcards
Atoms are_________ during a chemical reaction.
Rearranged
The bond between the ________ ______ are broken.
Reactant atoms
New _______ are formed
Bonds
What doesn’t change during a chemical reaction
The mass
What can tell you that a chemical reaction has occurred
A change in temperature or a visible change in the reaction mixture (colour change )
No atoms are related or destroyed during a chemical reaction. True or False
True
What are the reactants
The chemicals you start with
What are the products
The chemicals you end up with
Define word equation
An equation that expresses a chemical reaction by using the full names of the chemicals involved
Define symbol equation
An equation that expresses a chemical reaction using chemical symbols and for
What does it mean for a symbol equation to be balanced
It has the same number of atoms of each element on both sides
What is catalysts
A substance which speeds up a chemical reaction without being changed or used up in the reaction itself
Why catalysts be reused
Because they are not changed or used up in the reaction
What does using a catalyst lower
The minimum amount of energy needed for a reaction to happen
Because catalysts lower the minimum amount of energy needed what does this mean
The reaction can be carried out at a lower temprature
