bonds yr 9 Flashcards
what does RIG stand for?
Reduction
Is
Gain of electrons
what does reduction mean?
a type of reaction that is the loss of oxygen atoms through gaining electrons in a compound
what is the oxidised element in this reaction?
C + O₂ —> CO₂
carbon
what does aqueous mean?
a solid dissolved in a liquid
what carbon type is fullerenes?
C60
what is the difference between small covalent molecule and a giant covalent molecule?
small covalent molecules have very low boiling and melting points as they don’t have strong enough bonds to withstand the heat. They also are very bad conductors of electricity
do metals have high or low melting and boiling points and why?
high, the electrostatic forces of attraction between the delocalised electrons and the atoms are very strong
in a metallic bond, the forces that hold the molecules in place is called ___________________.
electrostatic forces of attraction
what does OIL stand for?
Oxidation Is Lose of electrons
what are polymers?
long chains of covalent molecules
do small covalent molecules have high or low melting and boiling points and why?
low, the bonds between the atoms are weak
give an example of a giant covalent molecule
diamond, graphite, sand
do ionic compounds have high or low melting and boiling points and why?
high, the intermolecular forces between the ions are very strong
in what states can ions conduct electricity and why?
liquid, aqueous because the electrons are free to move
do giant covalent molecules have high or low melting and boiling points and why?
high, the bonds between the atoms are very strong
