Alkaline+Earth+Metals

= ‍Alkali Earth Metals Research =

b. Explanation of the uses of the elements
Beryllium: The chemical element of atomic number 4, a hard grey metal Magnesium: The chemical element of atomic number 12, a silver white metal used to make strong light weight alloys, especially for aerospace. Calcium: A white metallic element that burns with a brilliant light, it is the fifth most abundant element in the Earth’s crust. Strontium: The chemical element of atomic number 38, a soft, silver-white metal. Barium: The chemical element of atomic number 56, a soft white reactive metal. Radium: The chemical element of atomic number 88, a rare radioactive metal

‍c. Explanation of any trends in behaviour within the group
The alkaline earths have two electrons in the outer shell. They have a less number of atoms than the alkali metals. The two valence electrons are bounded together, but not tightly bounded to the nucleus, so the alkaline earths lose electrons to form cation ions.

d. The structures/compounds the elements form
Beryllium: Beryllium has 4 protons and 4 electrons. It has 2 electrons in the inner most shell and in the out shell it has 2 electrons as well. The protons are found in the nucleus with the 5 neutrons the atom has. Because it has 2 electrons in the outer most shell this means it is more likely to give away it electrons. Magnesium: Magnesium has 12 protons and 12 electrons. It has 2 in the inner most shell, and then 8 and then finally 2 on the most outer shell. It has 12 neutrons and it is more likely to give away its electrons and become a cation ion. Calcium: Calcium has 20 protons, 20 neutrons, and 20 electrons. It has 2 electrons in the inner shell, then 8, and then 8, and finally 2 in the outer shell. It is more likely to give away electrons since it has 2 on the outer most shell. Strontium: Strontium has 38 protons, 50 neutrons and 38 electrons. It has 2 electrons in the inner shell and 2 in the outer most shell. Barium: Barium has 56 protons, 81 neutrons and 56 electrons. In Barium there are 2 electrons in the inner most shell and there are 2 electrons in the outer most shell. Radium: Radium has 88 protons, 138 neutrons and 88 electrons. There are 2 electrons in the outer most shell and 2 electrons in the inner most shell in Radium.

Reference:
|| Helmenstine, A 2011, //Alkaline Earth Metals//, The New York Times Company, accessed 23 September 2011, .
 * //Perodic Table //, 2010, Chart, Wolfran Research, accessed 23 September 2011, .
 * //Perodic Table //, 2010, Chart, Wolfran Research, accessed 23 September 2011, .

Dictionary Team, 2011, //Dictionary//, Ask, accessed 23 September 2011, . ||

By Joseph Melhem & Dimitri Fokianos 9A