Atomic Theory And Bonding Flashcards
Where are the elections in an atom
The energy levels (shells)
How many elections can the first 3 shells hold
1=2
2=8
3=8
The name for the number of protons in an element
Atomic number
Qualities of group 1
All solids
All has a density less than water (floats)
Reactivity increases going down the group
Boiling point decrease going down the group
Qualities of group 7
All diatomic elements
Reactivity decreases going down the group
All coloured glasses and liquids
Qualities of group 0
All colourless gasses
Inert
Often used in lighting
What group do most catalysts come from
The transition metals
What is the mass number
No. Protons +No. neutrons
What is RAM
Relative atomic mass, it takes into account different isotopes of atoms and makes an average mass
What is an isotope
Atoms of a given element which have a different number of neutrons
How do you calculate RAM
((% of isotope of element)x mass no.)+((%of isotope of element)x mass no.)
Metal ions and oxidation
They lose elections to give non-metals full outer shells this forms positive metal ions
Non-metal ions and reduction
They gain elections from metals to achieve full outer shells and a negative non-metal ion
What is ionic bond
Electrostatic force of attraction between two oppositely charges ions
Valency
The number of bonds that an element will make to achieve a full outer shell
Properties of ionic lattice structures
Doesn’t melt under benson burner
Doesn’t conduct as a solid
Soluble in water
Conducts as a liquid
Properties of covenant Bonds
Only non-metals
Electrons are shared
Two or more
7 diatomic elements
Hydrogen, oxygen, nitrogen, Florine, chlorine, Bromine and iodine
Properties of covenant molecular bonds
Does melt
Doesn’t conduct
Doesn’t dissolve
Properties of covalent networks
Doesn’t melt with bunson burner
Doesn’t conduct
Doesn’t dissolve
