1.Que es un alloy? Bronce?
An alloy is the mixture of 2 metals or more. Amalgan is a mixture of mercury and another metal.
2. Separation techniques.
Filtration: it separates solid and liquid.
Decanting: it separates 2 liquids
Magnetic: separates 2 solids (1 must be a metal)
Destillation: separation of two liquids
Crystalization: separation of solid and liquid
3. Problema de solution
4. Atomics model
Dalton(1808): elements are made up of small particles, called atoms, they are invisible and indestructible. Atoms of the same element are the equal and different from other elements.Compounds are formed by atoms of different elements
Thoms(1904): The atoms have positive charge and electrons are on top of it with negative charge. Atoms are neutral.
Rutherford(1911): Nucleus there is the positive charge and electrons are moving around in the shell. Atoms are neutral.
Isotops: are atoms with the same number of protons, but different number of neutrons.
Ions: atoms with negative or positive charge and have 2 types
Cation: (+) Lose electrons.
Anion: (-) Gains electrons.