What are the properties of astatine that make it unique

Periodic Table and Trends playlist: Halogens. NEXT LECTURE. Periodic Table and Trends. Halogens. Back to Atomic Structure and Molecules · Chalcogen's and Noble ... Jun 6, 2015 ... Electron affinities of the chalcogens and halogens · The general trend for electron affinity down the group is that it decreases because of the ... The Basic Properties of Halogens. Halogens, which fall under Group 7 of the periodic table, are known for their vibrant colors. For instance, fluorine ( F_2 ) ... Halogens are the group 7A elements in the periodic table. They are highly reactive nonmetals and exist as diatomic molecules. Dimitri Mendeleev (1834- 1907) invented the first periodic table. He arranged the elements by their increasing atomic masses. Elements with similar properties ... Explain some trends when going down Group 7 of Halogens in the Periodic Table. Going down Group 7 in the period table, the mass number increases, so the ... THE METALS!! Page 16. Alkali Metals. ○ Group 1 on periodic table. ○ Very reactive. ○ Soft solids. ○ Readily combine with halogens. ○ Tendency to lose one ... Buy The Periodic Table of Elements - Halogens, Noble Gases and Lanthanides and Actinides Children's Chemistry Book (Paperback) at Walmart.com. Halogens are a group of elements on the periodic table found in group 17. They are non-metals, and the term "halogen" means "salt-former" Aug 9, 2012 ... The other aliphatic-halogen bonds are weaker, their reactivity increasing down the periodic table. They are usually more chemically reactive ...