1 / 9

Metals

Metals. Section 16-2. Families on the Periodic Table. Columns are grouped into families. Families may be one column, or several columns put together. Families have names rather than numbers. (Just like your family has a common last name .)

ronia
Télécharger la présentation

Metals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Metals Section 16-2

  2. Families on the Periodic Table • Columns are grouped into families. • Families may be one column, or several columns put together. • Families have names rather than numbers. (Just like your family has a common last name.) • Elements in a family have similar chemical and physical properties.

  3. Properties of Metals • Abundant in the world • (coins, cars, planes, tools, etc.) • Exist as pure elements • (gold, copper, zinc, aluminum) • or alloys/mixtures (stainless steel) • Physical properties such as • high melting points, hardness, shininess, conductivity, malleable (shapeable), and ductile (pulled into wire) pure vs alloy ductile malleable

  4. Metals, nonmetals, & Metalloids • Metals– most of the elements on the table. Solids at room temp. • (Hg a liquid at room temperature) • Nonmetals – about 1/3 of the elements. Gases at room temperature. • Metalloids – seven elements located at the stair step. Properties of metals and nonmetals • (*semiconductors) Nonmetals Metals

  5. Alkali Metals • 1stfamily on the periodic table (Group 1), not including hydrogen • Very reactive metals, lose 1 ve- • Never found alone in nature, always in a compound (like in salt, NaCl) • As elements, shiny and soft enough to be cut with a butter knife • Sodium & potassium are found in compounds we eat. Li is in batteries and medicines Li Na K Rb Cs Fr 1 ve-

  6. Alkaline Earth Metals • 2nd family on the periodic table. (Group 2) • Second most reactive metals, lose 2 ve- • Always combined with nonmetals in nature • Hard, bright white metals that are good conductors of electricity • Mg is in flash cubesand calcium is in a lot of foods we eat (milk, cheese, etc) Be Mg Ca Sr Ba Ra 2 ve-

  7. Transition Metals • Elements in groups 3-12. • Less reactive metals such as iron, copper, nickel, silver, & gold. • React slowly with air or water to form rust. • Includes metals used in jewelry and construction. • Hard and shiny metals used as “real metals.” • Iron in the form of hemoglobin carries oxygen and makes our blood red

  8. Boron FamilyCarbon Family • Elements in group 14, • (one metal, twometalloids, & two nonmetals) • Contains elements important to life and computers • Carbon is the basis for an entire branch of chemistry known as organic chemistry • Lead made paint poisonous • Silicon is a semiconductor • Elements in group 13, (four metals and one metalloid) • Very light aluminum metal was once rare and expensive, was not a “disposable metal” 3 ve- 4 ve-

  9. Rare Earth Elements • Placed below for convenience • Uranium is used in nuclear power plants • After uranium (92) are man-made, not found in nature Lanthanides Actinides

More Related