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