METALSChapter 1, Unit 3

Monday, September 10, 2012

Something to think about…

List four (4) properties, physical or chemical, of most metals.

Compare the way metals on the left side and the right side of the periodic table react.

If you point to an element in the periodic table at random, is it more likely to be a metal, nonmetal, or metalloid? Explain.

How do very reactive metals behave?

What is a Metal?

Metals are all around you Common metals-zinc, iron, copper, aluminum,

nickel and silver Physical properties

Metals are classified by their hardness, shininess, malleability, and ductility

Most metals are solid at room temperature High melting points

Chemical Properties Metals show a wide range of chemical properties

Some are very reactive; others are not Reactive metals combine with other elements quickly

giving off energy.

Alloys

An alloy is a mixture of two or more elements that have properties of a metal.

Metals in the Periodic Table

Alkali Metals-Group 1 The most reactive metals of all Never found uncombined in nature

Only in compounds As an element, alkali metals are very soft and

shiny. 2 most important

Sodium and potassium

Metals in the Periodic Table, cont’d.

Alkaline Earth Metals-Group 2 Not as reactive as alkali metals Never found uncombined in nature Fairly hard Gray-white in color 2 most common

Magnesium and calcium Farther to the right-less reactive

Metals in the Periodic Table, cont’d

Transition Metals-Groups 3-12 Familiar metals

Iron, copper, zinc, nickel Good conductors of electricity Some are hard and shiny Fairly stable

React slowly or not at all with air and water Transition metals in the body

Iron Part of hemoglobin

Hemoglobin carries oxygen in the bloodstream Gives blood bright red color

Metals in Mixed Groups

Groups 13-16 Metals, nonmetals, metalloids

Lanthanides and Actinides Lanthanides

Soft, malleable, shiny metals High conductivity Found in nature Difficult to separate

Actinides Thorium and uranium exist in significant amounts Unstable nuclei Made in the lab and are so reactive that they last only a

fraction of a second after they are made.

Something to think about…

List 4 properties, physical or chemical, of most metals. Malleability, hardness, shininess, ductility

Compare the ways metals on the left side and right side of the periodic table react. Left side metals are very reactive and the farther right

you move the less reactive they become. If you point to an element in the periodic table at

random, is it more likely to be a metal, nonmetal, or metalloid? Explain? A metal-they are the most abundant in the periodic table.

How do very reactive metals behave? Combine with other elements quickly giving off energy.