Chemistry SP2 Flashcards
What are the 3 types of chemical bonding?
Metallic bonding
Covalent bonding
Ionic bonding
Define simple covalent bonding
A pair of electrons shared between two atoms.
Define giant covalent bond
Every atom is joined to other atoms with a strong covalent bonds.
What is ionic bonding?
The metal ‘gives’ its electron to the non-metal to form a positive and negative ions.
What is an ionic bond?
It is the attraction between a positive and a negative ion.
Why do ionic compounds have high melting points?
It takes a lot of energy to break the strong electrostatic forces of attraction between oppositely charged ions.
Why are ionic compounds able to conduct electricity when molten or dissolved?
Their ions can move freely.
What is a covalent bond?
A pair of electrons shared between the two atoms.
What is a molecule?
A small group of atoms that go around together.
Describe the structure of an ionic compound
An ionic compound consists of regular arrangements of positive and negative ions.
What is a polymer?
They are materials made of long repeating chains of molecules.
What are the properties if polymers?
High strength
Resistant
Tough
Why are giant covalent structures have high melting points and why don’t they conduct electricity?
Giant covalent structures have strong covalent bonds that need a very high melting point in order to break.
There are no delocalised or charged particles that allow electricity to flow.
