Elements Compunds And Mixtures Flashcards
What is a solid?
When particles are packed tightly together
What is a liquid?
When the particles can move and slide past each other
What is a gas?
When the particles are separated from each other and move a lot
What is an element?
An element is a substance that cannot be split up into slimmer substances by chemical means. Elements contain only one type of atom
What is an example of an element?
Hydrogen and oxygen
What is a compound?
A compound is a substance that is made up of two or more diff elements that are chemically combined. Compounds contain two or more different types of atom joined together by chemical bonds
What is an example of a compound?
Water and salt
What is a mixture?
A mixture consist of two or more different substances mingled together but not chemically combined
What’s an example of a mixture?
Milk, water
What are the differences between mixture and compounds?
A mixture has 2 or more substances, a compound is a single substance
What does iron + sulfur make?
Iron sulfide
Fe+s=feS
What are examples of physical changes?
Cutting paper, breaking glass and tying a knot
What are examples of chemical changes
Digestive system, wood burning and metal rusting
What is the law of conservation of mass?
The law of conservation of mass states that when a chemical reaction occurs the total mass of the reactants is always equal to the total mass of the products
