Chemistry Flashcards
(16 cards)
Period
Number of possible orbitals
Group
Valence electrons
Chemical properties
Reactions
Similar substances formed
Max no. of electrons in each orbital
2n^2
Acids
Group of chemical compounds
Taste sour
Burn skin
React w metals
Bases
Opposite to acids Found in household detergents Bitter Slippery to touch Alkalis= dissolve in water Eg. Hydroxide, ammonia
Reaction bases acids
Neutralisation
Indicators
Substances that change colour in acids or bases.
Litmus paper- blue bases red acids
Universal indicator- shows exact strength of solution more accurate
Oxidisation could result in
Huge releases of energy
Non-metals + oxygen
Usually - form molecular compound
- produce large amounts of heat energy
Acid + base->
Salt+water
Metal+acid->
Salt+hydrogen
Metal carbonate+acid->
Salt+carbon dioxide+water
Metal+oxygen->
Metal oxide
Hydrocarbon+oxygen
Carbon dioxide+water
Measure of half-life
With a sample
Half-life is when half x nuclei will decay
Full proton created by -1 or +1 electron
Very reactive
