reacts with water. IntroductionAlkali metals are in the first column of the periodic table and they may be readily fused and volatilized with their melting and boiling points becoming lower with increasing atomic mass. They are the strongest electropositive metals. (Kerrod‚ R. 2009) These elements react vigorously‚ even violently with water. Alkaline Earth metals are elements in the second column of the periodic table. These elements are in general white‚ differing by shades of color or casts; they
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Ce4+‚ Lu3+‚ Yb3+‚ Gd3+‚ Eu2+‚ Pu4+‚ U6+. 10. Why is thorium considered important from industrial view point? 11. What is the major source of Th? How is it extracted from this mineral? (Give guide only) 12. Discuss the position of Th and U in the Periodic table 13. Name two important minerals of uranium. Starting from one of these‚ outline a scheme for extraction of U and production of U3O8 14. Why is U deemed to be the key metal in nuclear industry? 15. How is UF6 produced? What is its importance? 16
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Magnesium General Information of The Element Magnesium is the twelfth element on the periodic table. The atomic number is 12‚ and its atomic mass is 24.305. Magnesium’s boiling point is at 1090C or 1994F‚ and its melting point is at 650C or 1202F.Its state of matter is solid. It is located in the second group called the alkaline earth metals. Magnesium is found in seawater‚ salty layers and in many rock minerals. IT could be used as metal. It’s the third most abundant structural metal
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characteristics that are similar. Also‚ because of their close relations with atoms‚ the Periodic Table can help you determine the similarities of these people and organize them. Purpose: To learn about the organization of the periodic table by using models. Materials: Packets of Chemicool People – fifteen packets with seventeen people – one per group Chemicool People Worksheet – one per group Periodic Table of Elements – one per student Procedure: 1. Remove the Chemicool people from the
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Titanium Ti Atomic Number: 22 Atomic Mass: 47.867 Protons:22 Electrons:22 Neutrons:26 8. Titanium is a metal and in the family of transition metals. It belongs to group 4 of the periodic table. 9. Titanium is a silver‚ lustre‚ low in density but is a strong metal. This metal forms a passive but protective oxide coating when exposed to elevated temperatures in air but at room temperatures it resists tarnishing. The most noted chemical property of Titanium is its excellent resistant
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can stored properly * chemicals can be handled properly * the situation of improper storage or handling can be dealt with quickly and safely 3.a) The atomic mass of an element on the periodic table is an average of the masses of the naturally-occurring isotopes. b) According to the periodic table‚ the average mass of boron is 10.8u. c) With an average mass of 10.8‚ and the choice being either boron-10 or boron-11‚ boron-11 should be most common because it is the nearest isotope to the
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Chapters 11 12 Periodic Table Name __________________ ( ) Class __________ Date _________ History of the Periodic Table Russian chemist Dmitri Ivanovich Mendeleev 1834-1907 Arranged elements in order of increasing atomic masses Elements with similar chemical properties fall into the same vertical column Such an arrangement is the Periodic Table The Periodic Table The Periodic Table is a list of elements arranged in order of ______________ _____________ (__________) ____________. Groups
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compared to each other it turned out they were in fact‚ the same thing. Although William Gregor was seen as the true and first discoverer of the metal‚ the name Titanium that Klaproth had given it was preferred and kept‚ as it’s official name in the periodic table. Finding this new metal was one thing‚ managing to obtain it though‚ was another. It wasn’t until the year 1910 that Matthew Hunter managed to isolate 99.9% of pure titanium‚ by heating titanium chloride with sodium‚ in a pressure cylinder
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Name____________________________ Date_____________ Period____ Periodic Table Worksheet Use a Periodic table to find the information asked for below: 1.What is the atomic number of: Calcium____ Iron _____ Gold_____ Uranium_____ 2. What is the Atomic mass of: Calcium___ Iron_____ Uranium_____ Copper_____ 3. How many protons do the following have? 4. How many electrons do the following have? Calcium have____ Gold have____ Gold_______ Iron_____ Copper______ Copper_____ Iron______ Uranium_____
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CHEM 101 – General Chemistry I Chapter 2 Reading Assignment Pages 31 - 60 2.1 – What is Matter Made Of? Who 1st discovered atoms – Democritus where the first person to discover atoms. His followers would often think that there were multiple kinds of atoms and not just plain atoms. 2.2 – How Do We Classify Matter? Elements – A substance that consists of identical atoms. Today there are 116 known elements. Example – C= Carbon; H= Hydrogen Compounds – A pure substance made up of two or more elements
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