What type of bond is formed when non-metal atoms share electrons?
Covalent bond
How many covalent bonds have formed between these two nitrogen atoms?
3
What does it mean if an atom "gets the electronic structure of a Noble gas"?
They gain or lose electrons to get a full outer shell (just like the Noble gas elements)
Two Oxygen atoms will bond together by sharing 2 pairs of electrons. What type of covalent bond is this?
A double covalent bond
Most of the molecules in the substances that make up living things are held together by the covalent bonds between non-metal atoms [True/False]
True
Atoms held together by covalent bonds only form small "simple" structures [True/False]
False - they can form giant structures also like diamond.
The carbon atoms in a diamond are held together by ionic bonds [True/false]
False - non metals bond together with covalent bonds.
Substances made up of simple covalent molecules have high or low melting points?
Low melting points, the bonds between molecules (not covalent) are weak
What are the forces between simple covalent molecules called?
Intermolecular forces
Can simple molecules held together with covalent bonds conduct electricity?
No, they do not have charged particles that a free to move.
Do giant covalent structures have high or low melting points?
High - the covalent bonds are strong.
Why can the layers of graphite easily slide off (e.g. when you use a pencil)?
The bonds between carbon layers are not covalent, they are weak intermolecular forces
Graphite can conduct electricity because it has free electrons in between the layers [True/False]
True
What is a huge network of atoms held together by covalent bonds called?
A giant covalent structure
Does Silicon dioxide (picture) form a simple or giant covalent structure?
Giant - you can tell as it can form crystals
