Flashcards in C4e Deck (10):
What is a metals structure?
-metals have crystal structures
-held together by metallic bonding (giving all metals the same basic properties)
-this allows the outer electron(s) of each atom to move freely
-creating a sea of delocalised (free) electrons throughout metal which gives rise to many of metals properties
What are the properties of most metals?
-high melting and boiling point and density
-strong, bendy and malleable
-good conductors of electricity and heat
-hard, dense and lustrous
Why do metals have high melting and boiling points?
-strong attraction between delocalised electron and the closely packed positive ions causes very strong metallic bonding
-metals have high melting and boiling points because of this, you need lots of energy to break them apart
Why are metals strong and flexible and malleable?
-metals have a high tensile strength (strong and hard to break)
-but can be hammered into different shapes (malleable)
Why are metals good conductors of heat and electricity?
-sea of delocalised electrons move freely through metal, carrying electrical current and heat energy
What transition metals and their compounds?
-mainly everyday metals
Why are transition metal compounds colourful?
-due to the transition metal ion they contain
What are transitional metals used for and where are they on the periodic table?
-middle of periodic table
How does the strength of metallic bonding decrease?
-as atomic radius increases