Chapter 7: Bonding and properties Flashcards
What is a lattice?
An ordered, three dimensional arrangement of atoms
What is ionisation energy?
The energy required by a gaseous atom to remove an atom
What is the characteristics of ionic compounds?
Relatively high melting and boiling points, solids and hard but brittle, do not conduct electricity and many are soluble in water
What are the characteristics of metals?
solid at room temperature (expect mercury and gallium) and good conductors of electricity and heat.
What is delocalisation?
Electrons shared between neighbouring metals, freely moving
What is a metallic bond?
The attractive force a metal ion and delocalised electrons
What are the effects of delocalised electrons?
High electrical conductivity, malleability and ductility, high thermal conductivity and high boiling points
What are covalent bonds?
Extremely hard solids with high melting points
What is an allotropes?
Made of carbon but have different lattices
What is intramolecular forces?
a force between the atoms in a molecule
What is intermolecular forces?
Forces between molecules
What is a hydrocarbon?
Compounds made of carbon and hydrogen
What is an alkane?
The maximum number of hydrogen atoms possible for the carbon atoms present
What are the properties of alkanes?
Largely unreactive, which makes them good solvents
What is an alkene?
Have one or more double bonds between carbon atoms and their names end in ‘ene’
