Ionic Bonding Flashcards
How many electrons fill the first shell of an atom
2 electrons
How many electrons does the outer shells have in an atom
8 electrons
Are metals positive or negative
Positive
Non metals are positive or negative
Negative
Metals loose or gain electrons
Loose
Non metals loose or gain electrons
Gain
How is an ionic bond formed
They transfer electrons from one shell to another to gain a full outer shell
Remember when drawing a diagram of an ion
- use brackets
- one using dots, one using crosses
- charge must be on the top right
What does lattice mean
Hundreds of atoms liked together
Solubility meaning
-Ionic compounds dissolved in water
-lattice is spilt up by water molecules so the ions can move around freely
What is a melting point
It takes more energy to break the strong electrostatic forces
What is conductivity
If the substances are able to pass water through water
Is an ion is a charged particle, is it positive, negative or both
Positive / negative
The word to describe the loose electrons on the outer shells of metal atoms
Delocalised electrons
Covalent bonding occurs between
Non metals only
Electrostatic forces hold the
covalent bonds together
Simple covalent structures have a weak __________ _____ that takes less energy to be broken
Intermolecular forces
Simple covalent structure do not conduct because
They don’t have ions to carry the charge- no delocalised electrons
Polymers are made from
Small molecules joined together
Polymers have a low melting point because they are
Simple covalent structures - no ions ( delocalised electrons) to carry the change
Intermolecular forces are strong or weak?
Weak
Simple covalent structure have a ______ melting point
Low
Do Giant covalent structures conduct or not? And why
They do not conduct -they do not have delocalised electrons
What is Nanoscience
The study and use of extremely small substances
