1. II Parcial
Resumen de Ciencias

2. Atom : Element :: Molecule : Compound
Terms
Atom (Átomo): The smallest and basic building block of Matter.
Element(elemento): pure substance that can´t be broken into smaller pieces
Molecule(molécula): Group of Atoms transforming into a new substance, with new properties and characteristics
Compound (compuesto): Substance formed by two or more elements.
chemical formula (formula química) the amount of element atoms on a compound
Ratio(relación): the difference between each compound´s elements
Mixture (mezcla): two substances not chemically combined
Vean de esta forma, los que entienden relaciones
Atom : Element :: Molecule : Compound

3. Differentiate between a pure and impure substance. Analyze examples
The basic difference is that, impure substances are always mixtures, they are never compounds or elements.
Si el examen tiene una pregunta como:
Salt (NaCl), Oxygen (O), Sugar (C12 H22 O11) etc. Es una substancia pura, y elemento o compuesto.
Si salen comidas, puños de cosas, aire, mar, ese tipo de cosas son mezclas o sustancias impuras.

4. Differentiate between a compound and an element.
Differences of this terms are that elements are substances made by only one type of element.
Compounds are made by several types of elements.
Ojo: Si tienen una substancia que es por ej.: Oxygen (O2) ES UN ELEMENTO NO UN COMPUESTO

5. Differentiate between a homogeneous mixture, colloids and a heterogeneous mixture and provide examples.
A mixture is a combination of elements and compounds in the same place at the same time, not chemically combined. All mixtures are impure substances.

6. Differentiate between colloids, suspensions, solutions
Colloids, are mixtures of (usually 2 different states), a characteristic is that almost all colloid has visible tiny spots of both substances. A solution is almost impossible to visually separate both substances, and suspensions, are both, if they are shaken is available to visually separate in layers, if not, they are mixed without possibility to separate.

7. Colloids Continuous phase Disperse phase Gas Liquid Solid
Liquid Aerosol
Fog, Mist, Air spray
Solid Aerosol
Air, Smoke, Cloud
Liquid Foam
Styrofoam (?)
Gel
Jelly
Solid Sol
Cranberry Glass
Foam
Shaving Cream
Emulsion
Milk
Sol
Blood
La Fase Dispersa, es la fase “mas pequeña”, es la segunda fase
La Fase Continua, es la fase grande la general.

8. Solutions
Solute: the substance in a lesser amount (is usually a solid)
Solvent: the substance in a greater amount (always a liquid)
Concentrate: the density of how much solute is in the mixture

9. Separation Methods Filtering Crystallization Distillation Decantation
Chromatography
Centrifugation
Evaporation
Magnetism

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Si no entienden alguna defunción, NO ME PREGUNTEN A MI, PREGUNTENLE A TEACHER, ELLA HIZO Y ELLA SABE LOS TEMAS Y ELLA NOD DIO LA CLASE EL EXAMEN, NO YO.