Elements, Atoms, Compounds and Molecules
ATOM
An atom is a fundamental piece of matter. Atoms are made up of protons, neutrons and electrons.
Nucleus
Protons
Neutrons
Electrons
ELEMENT
An element is a substance that is entirely made up of one type of atom.
METAL
A metal is an element, compound or alloy that conducts electricity and heat. Metals are malleable and ductile.
Copper
NON-METAL
A non-metal is an element in the periodic table that does not have the properties of a metal element such as malleability. Non metals are usually found as gases in nature or weak, brittle solids.
Sulphur
THE PERIODIC TABLE
The Periodic Table is a tabular display of the chemical elements.
WHAT IS A COMPOUND
A chemical compound is a pure chemical substance consisting of two or more different chemical elements.
WHAT IS A CHEMICAL REACTION?
A chemical reaction is a process that leads to the transformation of one set of chemicals substances to another.
WHAT IS THE DIFFERENCE BETWEEN A CHEMICAL AND PHYSICAL REACTION?
A physical change is reversible, a chemical change is not. For example, the freezing of water would be a physical change because it can be reversed, whereas the burning of wood is a chemical change because you can’t reverse it.
IDENTIFYING CHEMICAL REACTIONS
Heat, light, gas or precipitate
WHAT FACTORS AFFECT A REACTION RATE?
Temperature, concentration, size of particles or using a catalyst.
BIBLIOGRAPHY
http://www.qrg.northwestern.edu/projects/vss/docs/Propulsion/1-what-is-an-atom.html
http://education.jlab.org/qa/element.html
http://en.wikipedia.org/wiki/Periodic_table