7H Atoms, Elements and Molecules Flashcards
Particles
Tiny pieces of matter that make up everything.
Atoms
The simplest particles of matter that make up everything.
Elements
A substance made up
of one type of atom.
Molecules
Two or more atoms joined together in a group.
Compound
Two or more different atoms joined together.
Mixture
Two or more substances jumbled together but not chemically joined
together.
Naturally Occurring Elements
Usually found as compounds, some found pure. Can be extracted from compounds by simple chemical reactions.
Pure
A substance made up of a single element/compound and nothing else.
Common Metal Properties
Solid, high melting point, strong, flexible, malleable, shiny and good conductors of heat and electricity.
Metals
Three-quarters of all elements are metals- found on the left side of the periodic table.
Common Non-Metal Properties
Low melting points, brittle, not shiny and poor conductors of heat and electricity.
Malleable
Able to be beaten and bent into shape.
Forming Compounds
The first stage often involves heating a mixture of elements. Energy is often given out when elements react to form compounds.
Bonds
Formed between atoms when compounds are formed.
Carbonates
Compounds containing a metal, carbon and oxygen.
