Bonding Flashcards
What is an ionic bond?
A bond between a metal and non metal
Why are ionic bonds so powerful?
The negative and positive charges attract strongly
All metals form…
positive ions
Group 0..
Do not form ions as they are stable and non reactive
Why do ionic compound s have high melting and boiling points?
Lots of energy is needed to overcome strong attraction between positive and negative ions
Why do ionic compounds only conduct when molten?
The ions can move and carry current
What is covalent bonding?
When non-metal elements share electrons to gain a full outer shell
Name the properties of simple covalent molecules
Low melting and b points - weak IMF between molecules
Don’t conduct electricity - no free Ions/electrons to carry current
What are the allotropes of carbon?
diamond and graphite
Properties of diamond
High melting point - strong covalent bonds Very hard (like Ben/rapey cunt)- rigid network of carbon Doesn't conduct electricity- No free electrons
Properties of carbon
Very high mp- strong covalent bonds
weak and soft- weak forces between layers, slide
Conducts electricity- delocalised electron
positive
more proton than electron
