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問題一覧
1
Study of chemicals
Chemistry
2
What are the states of matter
Solid, Liquid , Gas, Plasma
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What is matter?
Anything that occupies space and has mass
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Physical properties are...
Substance that can be determined and measured without changing the composition or identity of the substance
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Chemical properties are...
Properties that tells us how the substance interacts with other substances and may include reactions with oxygen, chlorine, metals, etc.
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Observed and measured without changing chemical identity of sample
Physical properties
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Color. Length. Volume. Opacity.
Physical properties
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Observed and measured as sample changes chemical identity
Chemical properties
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physical property of matter that is independent of the amount of a substance
Intensive Properties
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Acidity. Reactivity. Flammability. Toxicity.
Chemical properties
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Temperature. Boiling Point. Concentration. Luster.
Intensive properties
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Weight. Length. Volume. Entropy.
Extensive properties
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physical property of matter that depends on the amount of the substance
Extensive properties
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Represents a temperature at which solid can change to liquid
Melting point
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Temperature at which liquid boil
Boiling point
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Describes relationship between the mass of material and it's volume
Density
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Ability to burn defined as reacting quickly with oxygen to produce light and heat
Combustibility
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(4Fe+30-v2 —→ 2-F-v2-O-v3)
Rusting
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To separate a solid to a liquid in a heterogeneous mixture which filters membrane, like paper and clothes
Filtration
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To separate a liquid in a homogeneous mixture
Distillation
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To separate a magnetic solidfrom a heterogeneous mixture
Magnetic separation
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To separate a solid from a liquid in a heterogeneous mixture based on gravity
Decantation
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To separate a volatile solid from a non-volatile solid
Sublimation
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A substance that can easily transform from its solid phase to its vapor phase without going through a liquid phase.
Volatile solid
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A substances which do not vaporize rapidly
Non-volatile Solid
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To separate a liquid from a solution to leave solid materials
Evaporation
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Refers to the compound or substance
Chemical
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Refers to the symbolic expression
Formula
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Is a symbolic expression of a compound or substance, described as shorthand of expressing the types and the number of atoms in a substance
Chemical Formula
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Are the abbreviation used in chemistry for chemical elements, functional groups, and chemical compounds
Chemical symbols
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Number placed half a line below their associated atomic symbols, it tells you how many atoms of each each element represents
Subscripts
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Number placed half a line above their associated symbol, it tells the mass number of the element.
Superscripts
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How to decode a molecular compound. STEP 1:
Underline the capital letters. this tells you how many elements are in your molecule
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How to decode a molecular compound: Step 2
Write the symbols the molecule has in the symbol column
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How to decode a molecular compound: Step 3
Element name - Uses periodic table to identify what elements the symbol have
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How to decode a molecular compound: Step 4
How many atoms? If their is a small number right beside the symbol, this indicates how many atoms you're elements have
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How to decode a molecular compound: Step 5
Determine the common name of the given