Atoms ATOMS, BONDING AND MOLES Flashcards
What is an element?
A substance in which all of the atoms are the same. It is pure.
What is a compound?
Where 2 different atoms have bonded together.
What is a mixture?
Where 2 different atoms are mixed together but are not chemically joined.
What is a molecule?
A grouping of 2 or more atoms which have been bonded together. The atoms can be the same type or different.
What happens to the electrons in a chemical reaction?
They are transferred between atoms so bonds can be made. The new product that is made is more stable than the starting reactants.
What is a reactant?
A substance we start with before a chemical reaction takes place.
What is a product?
A substance made as a result of a chemical reaction.
What is the law of conservation of mass?
The total mass of the products is equal to the mass of reactants. (Only of all of the reactants react)
