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  • Publicado : 22 de agosto de 2012
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2 –part
1-Is the fact that gases can be compressed proof of the fact the majority of the atom is empty? Gases can be compressed and expanded very easy because there are plenty of space between theparticles.
2-Is the volume occupied by an atom less than, more than are the same as the volume occupied by the total sum of all the volume of all the particles that constitute the atom? Thevolume is the total space occupied by a body. The volume of a atom it has the same quantity of the total sum of all the volume of all the particles of the atom.
3-Is a mixed substance the same aschemical compound?
A compound is a substance in which atoms of different elements are chemically held to one another. A mixture is a substance made by combining two or more different materials insuch a way that no chemical reaction occurs. A mixture can usually be separated back into its original components, a compound can not.

Compounds

• Compounds are pure substances.
• They are madeup of two or more elements combined chemically.
• The constituents of a compound are present in a fixed ratio.
• Compounds have fixed properties. For example, a particular compound will have fixedtemperatures at which it melts and boils.
• A compound can have properties different from its constituents, as a new substance is formed when the constituents are chemically combined.
• Theconstituents of a compound can be separated only by chemical methods.

Mixtures

• Mixtures are impure substances.
• They are made up of two or more substances mixed physically.
• The constituents of amixture are present in varying ratios.
• Mixtures do not have fixed properties. Their properties depend on the nature of their components and the ratios in which they are combined.
• In mixtures, nonew substance is formed. The properties of a mixture are the same as the properties of its constituents.
• The constituents of a mixture can be separated easily by physical methods.

4-If there...
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