um plz help me
Answers:
Metals
- A typical metal is a hard, shiny solid that --due to metallic bonding -- is malleable, ductile, and a good
conductor.
- Malleable means it can be hammered or rolled into sheets.
- Metallic bonding is where positively charged metallic ions are surrounded by a �sea of electrons.�
- Group 1 is the alkali earth metals. They are good conductors of heat and electricity, and they are highly
reactive. They include: lithium, sodium, potassium, rubidium, cesium, and francium.
- Group 2 is the alkaline earth metals. They are so reactive that they aren�t found free in nature. They include:
beryllium, magnesium, calcium, strontium, barium, and radium.
- Transition elements (Groups 3-12) include: the iron triad; the coinage metals (copper, silver, gold); and the zinc,
cadmium, and mercury.
- Only elements in the iron triad (iron, cobalt, nickel) can be magnetic.
- Copper is often used in electric wiring due to its ability to conduct electricity.
-Coinage metals-- resistant to rusting and other chemical reactions,--- Cu, Ag, Au
This article contents is post by this website user, EduQnA.com doesn't promise its accuracy.
More Questions & Answers...