Structure and Bonding Flashcards
Covalent bonding
Sharing electrons
When elements react together what do they from
They form compounds by gaining or losing electrons or by sharing electrons
Metal atoms lose or gain
Lose electrons to form positive ions because they have lost weight so they are happy
Non metals lose or gain
Non metals gain electrons to from negative ions as they have gained weight and are not happy
What’s an ion
Electronically charged atom, a-e-i-o-u remember
How many electrons do group 1 have in their outer shell
1
Symbol for sodium chloride
NaCl
Ionic bonding what is it between
Metal and non metal
Covalent bonding what is it between
Non metal and a non metal
What is ionic bonding
Ionic compounds held together by strong forces between the oppositely charged ions
Compounds
Two or more elements reacting together
What do the ions form in ionic bonding
Giant structure or lattice
What do all ionic commands have
Giant structures
How can we represent atoms and ions involved in forming ionic bonds
Dot and cross diagrams
Charges on on the ions in an ionic compound…
Always cancel each other out
Covalent bonding
Two atoms share a pair of electrons sharing is caring
Atoms of non metals need to…
Gain electrons to have stable electronic structures
Atoms of elements in group 7 need to…
Gain one electron form a single covalent bond
Many substances containing covalent bonds consist of…
Simple molecules
In covalent some have giant covalent structures, give an example
Carbon
What can giant covalent structures be called
Macromolecules
Only use the word molecule when doing what
Describing substances that are covalently bonded
What are th atoms like in a metallic element
All the same size
What do metals form
Giant structures where atoms arranged the same
Delocalised electron
Electrons in outer shell detach
Why do elements in group 1 form ions with a single positive charge
As they loose one electron from outer shell to become stable
Why do elements in group 7 form ions with a single negative charge
As they gain one electron to become stable
Molecules
Group of atoms bonded together
Why do ionic compounds have giant structures
Strong intermolecular forces so they can comply with, diamond being one with one carbon and three hydrogen
