Question

Periodicity of Chemical Properties 4. Which element is a commonly found element which forms a green gas in its elemental state? This gas is extremely toxic and can be fatal at concentrations of less than 1000 ppm. This element forms an interesting allotrope called Buckminster fullerene. Which clement is Ruckminster fullerene composed of and how did this allotrope get its name? 6. Many gemstones are composed of aluminum compounds. When this element is present in trace amounts in beryl or beryllium aluminum silicate it forms emeralds. When this element is pres- ent in corundum or aluminum oxide it forms rubies. What is this element? 7. Which element is a solid at room temperature, but will melt when held in your hand (37 °C)? This element was named after a chicken because it was discovered by Paul-Emile Lecoq. And has highest spread between MP and BP! 8. This element was named from the Greek word "iris" meaning rainbow because of the colorful compounds it tends to form. 9. What element forms the most dense elemental liquid known? 10. What primary elements are added to iron to make stainless steel? 11. What element is dephloginisticated air missing?

Answer 1

A) Amy chlossene (dz). 57 am:- Carbon (C). Buckminister fullerene has a molestan formula Prova CEO It has a cage line bused ring structure i. & like truncated icosahedron, Yand it resembeless a soccer ball, made of Leventy thexagens and tewielve twelve -pentagomb. tor's structure re mended the scientist of some from the feild of architecture - the futuriste'ć "ulgeodesie" domes invented by " Buckminster Fuller in the 1930s. 50, the Molecule iš named as "-Buckmeisterfulierene". by Amb Chocomium (ere) - I Am. Gallium (Gra). BY Am! Trudium. (Irl). qy Ami Mercury (Hg). Boy Ami- Carbon (C) My Ame- Onygen (02)