Extraction of Metals from their Ores Worksheet Coursework

Extraction of Metals from their Ores Worksheet - Coursework Example an alloy with lead called solder/ it was used back in the Bronze Age to make alloys/ it is malleable, ductile and becomes a superconductor at low temperatures It is used in plumbing and to make electrical wires/it was used even in prehistoric times and was later used to make brass/Very good conductor of electricity, malleable, resistant to corrosion and very unreactive. It is used mainly for jewellery and decorative purposes, and also for electrical contacts and electroplating/Used in Ancient civilizations especially Egypt for jewellery and ornaments/it is highly unreactive, malleable and ductile. These elements are strong non-metals and are unstable in their elemental state and they can form stable compounds when reacted with the more reactive metals. Furthermore the reactions that form these compounds are exothermic hence they are favoured and oxygen and sulphur are commonly bonded to metals in their ores. 4. Referring to the table of reactivity for metals on page 231 of your text book, can you see any relationship between the reactivity of the metals and their date of discovery? Describe any relationship you can see. There is a relationship between the reactivity of elements and their date of discovery; the more reactive elements were discovered later, around the 18th and 19th century, whereas the less reactive elements were discovered at the latest by 1000 BC. More reactive elements such as potassium to magnesium were discovered around the early 19th century, while less reactive elements, starting from zinc to silver were discovered from 1000 BC dating back to as much as 9000 BC. Method 1: React the metals with cold water, warm water and/or hot water and note the reaction that follows. More reactive metals will react easily with cold water, less reactive metals with react less vigorously with warm water whereas the metals with very low reactivity will not react even with hot water. Method 2: React the metals with dilute hydrochloric acid. The metals that

The Performance Management Quandary Research Paper

The Performance Management Quandary - Research Paper Example Performance Management takes on multiple shapes and sizes in differing organizations and they are indeed different. Additionally, the firms with a high performing culture as expected utilize performance management methodologies and tools to their benefit a case which is not evident with the firms which are lower performers. However, performance management approaches must be appropriate for the firm’s size and business maturity. This is to ensure that the costs which would otherwise add onto the firm’s burden would be reduced drastically. Further, as Millennial enter and continue to dominate the mix of the workforce, organizations should prepare to modify their Performance Management strategy to accommodate the impatient parties. The performance management process and systems should align with the needs/desires of millennial group to make sure they stay to help the firms realize their objectives. Because of the diverse nature of most organizations and the objectives for improved performance by most organizations, one single form of performance management systems would not be appropriate hence from research we have several to be applied in an organization depending on the uniqueness of the organization. The available most frequently used types of management systems will include: - Ranking, Forced distribution, 360 degree feedback, competency based, management by objectives, Graphic Rating scales, Behavioral Anchored Rating Scales and many others. The types of performance management systems as stipulated below are all relevant systems which are geared towards enabling any given organization to bust their performance strategies as appropriate as possible. As a matter of fact, this forms of