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= Welcome to the TPLC Chemistry Wiki! =

=__**Student Instructions:** __= = = // **Create a Glogster about your assigned element. In addition to information on your element you need to post your OWN limerick about the make-up of an Atom (including protons, neutrons, and electrons).** //
 * About your Element Please Include:**
 * Name (and why it has its name)
 * Abbreviation (Symbol)
 * Atomic Number
 * Weight
 * Where it's at on the Periodic Table (and why)
 * What the atom looks like (create your own model if you can)
 * What it's used for
 * What it usually bonds with
 * The history/discovery of the element

__**Your study guide:**__

• Particles in an atom and where they are at • The first 10 elements in the periodic table and their atomic number • The formula for Density and what it means • Temperature's effect on Density • Pressure's effect on Density • What happens to the Density of a liquid (solvent) when a solute is dissolved in it? • Why does oil float on water? • The steps to the scientific method (in order) • Properties of different states of matter • Be able to tell about an element by looking at the periodic table • Be able to identify an element by looking at its atomic model

=Vocabulary:=


 * Atom** - The smallest component of an element having the chemical properties of the element


 * Atomic number** - The number of positive charges or protons in the nucleus of an atom of a given element


 * Compound** is a chemical substance that is formed from two or more elements, that bond in a fixed ratio. For example, water (H2O) is a compound that is composed of two hydrogen atoms for every oxygen atom. A compound is a pure substance.


 * Density** - The compactness of a substance. Often measured in kilograms per cubic metre (kg/m³) or Specific Gravity (gram/cm3)

An element is composed of one kind of atom. An element is a pure substance. An element cannot be broken down by physical or chemical means. 90 elements occur naturally on Earth. The other 19 or so are made in the lab. This means that in the universe, there are only 90 different types of atoms that make everything. C, H, O, N and P are the primary elements that make up living organisms.


 * Electron** - An elementary particle consisting of a charge of negative electricity


 * Group** - Elements forming one of the vertical columns of the periodic table


 * Heterogeneous Mixture** – made up of visibly different substances or phases such as sand since you can see different colored particles. Another example might be a mixture of oil and water in salad dressing.


 * Homogeneous Mixture** – appears uniform and consistent throughout. These may include solutions, brass, and glass.


 * Ion:** a charged particle formed when an atom (or molecule) gains or loses one or more electrons.


 * Metal** - Any of a class of elementary substances, As gold, silver, or copper, all of which are crystalline when solid and many of which are characterized by opacity, ductility, conductivity, and a unique luster when freshly fractured


 * Mixture** = a physical combination of 2 or more substances. Each substance maintains its own properties. The substances can be physically separated.

A **molecule** consists of two or more atoms that bond by sharing their outer electrons. Hydrogen gas (H2) and water (H20) are examples.


 * Noble gasses** are elements found in column 8 of the periodic table. Each element in this family (Helium, Neon, Argon, etc…) has a complete outer ring of electrons. This is why they do not interact with other atoms.


 * Neutron** - An elementary particle having no charge, found in the nucleus of atoms.


 * Nucleus** - The positively charged mass within an atom, composed of neutrons and protons, and possessing most of the mass but occupying only a small fraction of the volume of the atom


 * Period** - A sequence of elements arranged in order of increasing atomic number and forming one of the horizontal rows in the periodic table.


 * Periodic table** - A table of the elements according to their atomic numbers so that elements with similar properties are in the same column


 * Proton** - A stable, positively charged subatomic particle located in the interior of an atom.


 * Symbol:** Consists of one, two or three letters. If there is more than one letter, only the first letter is capitalized. The symbols for some have been known since ancient times and are derived from their Latin names. Ex: Potassium (K) is Kalium in Latin. Sodium (Na) is Natrium in Latin.


 * Valence electrons** are electrons outside filled rings or shells. They are the outer electrons.