Classify each of the following as a pure substance or a mixture. If a mixture, indicate whether it is homogeneous or heterogeneous: (b) beer
Ch.1 - Introduction: Matter, Energy, and Measurement
Chapter 1, Problem 15c
Give the chemical symbol or name for the following elements, as appropriate: (c) cobalt
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Chemical Symbols
Chemical symbols are one- or two-letter abbreviations used to represent chemical elements. Each symbol is unique to an element and is derived from its English or Latin name. For example, the symbol for cobalt is 'Co', which allows for a standardized way to communicate about elements in chemical equations and formulas.
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Element Names
Each chemical element has a specific name that is recognized internationally. The name often reflects the element's properties, its discoverer, or its origin. For cobalt, the name is derived from the German word 'kobalt' or 'kobold', meaning goblin, due to the difficulties miners faced when extracting it from ores.
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Periodic Table
The periodic table is a systematic arrangement of all known chemical elements, organized by increasing atomic number. Each element is placed in a specific location based on its properties, such as reactivity and electron configuration. Cobalt is located in group 9 and period 4, indicating its classification as a transition metal with specific chemical behaviors.
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Related Practice
Textbook Question
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Textbook Question
Classify each of the following as a pure substance or a mixture. If a mixture, indicate whether it is homogeneous or heterogeneous: (c) diamond
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Textbook Question
Classify each of the following as a pure substance or a mixture. If a mixture, indicate whether it is homogeneous or heterogeneous: (d) mayonnaise.
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Give the chemical symbol or name for each of the following elements, as appropriate: (a) rhenium
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Textbook Question
A solid white substance A is heated strongly in the absence of
air. It decomposes to form a new white substance B and a gas C.
The gas has exactly the same properties as the product obtained
when carbon is burned in an excess of oxygen. Based
on these observations, can we determine whether solids A
and B and gas C are elements or compounds?
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Textbook Question
Zirconia, an oxide of zirconium, is often used as an affordable diamond substitute. Just like diamond, it is a colorless crystal which sparkles under sunlight. Which of the following physical properties do you think would help in differentiating between diamond and Zirconia—melting point, density, or physical state?
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