Periodic table basics

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Periodic table basics:

Periodic table basics Metals, non-metals, and metalloids & group names

The periodic table:

The periodic table The periodic table lists all know elements. These elements can be divided into metals, non-metals, and metalloids. Metals occupy the vast majority of the PT. They inhabit the left ~70% of the PT. Non-metals inhabit the right side of the PT. Metalloids separate these two groups from one another.

Let’s take a look:

Let’s take a look

Metals:

Metals Most elements are metals . They are typically shiny, good conductors of heat and electricity, have a high density, and only melt at high temperatures. Metals are ductile and malleable, so their shape can be easily changed into thin wires or sheets. Metals will corrode, gradually wearing away like rusting iron.

Non-metals:

Non-metals Nonmetals , on the right side of the periodic table, are very different from metals. Their surface is dull and they are poor conductor of heat and electricity. As compared to metals, they have low density and will melt at low temperatures. The shape of a nonmetal cannot be changed easily as they tend to be brittle and will break.

Metalloids:

Metalloids Elements that have properties of both metals and nonmetals are called metalloids . They can be shiny or dull and their shape is easily changed. Metalloids typically conduct heat and electricity better than nonmetals but not as well as metals. All the information from the previous 2 slides and this one were take verbatim from the following website: http://www.windows.ucar.edu/tour/link=/earth/geology/metals.html&edu=high

Bonding:

Bonding This topic is very complicated and will be covered in greater depth later. For now memorize this: The bond between two metals is “metallic”. The bond between a metal and a non-metal is generally “ionic”. The bond between two non-metals is “covalent”.

Examples:

Examples Identify the type of bond that would probably exist between each of the following elements. A = ionic, B = covalent, C = metallic Na-Cl O-O Mg-Cu Cl-F Ba-I

The different groups on the PT:

The different groups on the PT There are 4 groups on the PT that I want you to know by name: Alkali metals Alkaline earth metals Halogens Nobel gases They are located at the extreme right and left of the periodic table.

Look where they are:

Look where they are Alkali, Alkaline Earth, Halogens, Noble gases

Their properties:

Their properties Alkali metals- Highly reactive metals. They explode when dropped in water. Alkaline earth metals- Reactive, hard, and dense. Not as reactive as alkali metal. Halogens- Highly reactive non-metals. Used as antiseptics (kill germs). Noble gases- Almost completely non-reactive. Rarely form bonds with any other element. You may look them up on the web if you like.

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