Structure of Covalent Flashcards
What are the relative melting points for giant covalent structures
High melting points due to all the covalent bonds
How well do giant covalent structures conduct electricity
Not very well due to their being no charged particles which are able to move around
What are the strengths for giant covalent structures
Strong due to large number of covalent bonds
What is an Allotrope
Different structural forms of the same element in the same physical state
What type of forces does metallic bonding have
Strong electrostatic forces between metal ions and delocalised electrons
Why do metals have high boiling points
Strong electrostatic forces between metal cations and electrons require lots of energy to break
How can metals Conduct electricity
because of the free moving delocalised electrons
What is simple covalent bonding
Shared pair of electrons
Why does Cl2 have low melting and boiling points
Weak intermolecular forces between molecules meaning less energy is needed to overcome the forces
What type of forces does covalent bonds have
weak intermolecular forces
What type of forces do Ionic compounds have
Strong electrostatic forces between oppositely charged ions
Why do Ionic compounds have high melting points
Strong electrostatic forces between oppositely charged ions, lots of energy is needed to overcome forces
Why can’t ionic compounds conduct electricity in solid form
Ions are in fixed positions in giant lattice structure, however can conduct if molten or in solution as IONS are free to move
Lithium reacts with oxygen
4Li + O2 -> 2Li2O
