chemical reactions Flashcards
what is a chemical reaction?
it is when 2 or more elements join to make two or more products.
what is a element?
a element is oxygen or anything like that
what do to copper atoms react to?
oxygen
what is a atom?
the smallest particle of a chemical element that can exist.
When methane burns in oxygen, carbon dioxide and water are made. Which is a reactant?
Carbon dioxide
Copper oxide and carbon dioxide are made when copper carbonate is heated strongly. Which is a product?
Copper carbonate
What name is given to the force that holds atoms together in a compound?
Electrostatic attraction
What is another name for combustion?
Reduction
Combustion reactions always release energy. What word can be used to describe them?
Exothermic
Which of these is found in the fire triangle and is therefore essential for combustion?
Oxygen
What is a hydrocarbon?
A compound that contains carbon and hydrogen
What is produced when a hydrocarbon fuel burns in a very good supply of oxygen?
Carbon and water
Which type of combustion releases the most energy?
Incomplete combustion
What name is given to a substance that speeds up a reaction without being used up or chemically changed?
Catalyst
Which of these is the smallest particle?
a molecule
