Element Review.

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Presentation transcript:

Element Review

1. Identify the element Answer: calcium Discovered in 1808 by Sir Humphry Davy The name is derived from the Latin word meaning lime. A silvery white, soft metal that reacts with water. One of the most abundant elements on Earth. There are vast deposits of its carbonate. When heated in kilns the carbonate of this element gives off carbon dioxide gas to leave quicklime. This reacts violently with water to give slaked lime. Answer: calcium

2. Identify the element Answer: oxygen Discovered by Joseph Priestley in Wiltshire, England and independently by C.W. Scheele in Uppssala, Sweden in 1774. The name is derived from the Greek word meaning “acid forming”, although this name is misleading nowadays. A colourless, odourless gas. This element is essential for all forms of life since it is a constituent of DNA, and it comprises over half the mass of the average person. Answer: oxygen We it breathe in so that it can react with energy stores in our bodies to provide the heat and motion that keeps us alive.

3. Identify the element Answer: phosphorus Discovered by Hennig Brandt in 1669 The name is derived from the Greek word meaning “bringer of light”, because it glows in the dark. There are several different forms including White and Red. White is spontaneously flammable when exposed to air above 30°C and is a deadly poison. Red is made by gently heating white. Red is used mixed with powdered glass stuck on the side of boxes of safety matches for matches to be struck against to light them. Answer: phosphorus

Extra Credit: Odd beard out, not a scientist Temperature? Absolutely! Clues I get the credit for dreaming up the Periodic Table! A B Mendeleev Lord Kelvin Workers of the World unite! C D Van der Waals Intermolecular forces are named after me! meme! Karl Marx