Flashcards in C2.1 Bonding Deck (14):
What happens to electrons during covalent bonding?
Electrons are shared
What happens to electrons during ionic bonding?
Electrons are transferred- metal to non-metal
How are ions formed?
In ionic bonding, the atoms involved lose or gain electrons to form charged particles called ions
What are ions electron structure like?
Like the noble gases- a stable electronic structure
Which types of bonding have high melting and boiling points?
Ionic and metallic
Which bonding has low melting and boiling points?
What does covalent bonding result in?
Outer electron shells overlapping
When can ionic compounds conduct electricity?
When molten or dissolved in water as their ions can become mobile and can carry charge through the liquid
When are covalent bounds formed?
When atoms of non-metals share pairs of electrons with each other
Why do simple molecules (covalent substances) have low boiling and melting points?
They have weak intermolecular forces
Why can't simple molecules conduct electricity?
They have no overall charge, so they can't carry electrical charge
Explain metallic bonding
Positively charges metal ions, which are held together by electrons from the outermost shell of each metal atom
What are electrons in the 'sea' of free moving electrons called?