1. Lithium, Beryllium, & Boron

2. LITHIUM By: Sonia Hung

3. Basic Info Element name: Lithium Element symbol: Li Atomic Number: 3 Atomic Mass: 6.941 amu Solid, liquid, or gas? Solid at 298 K Metal, nonmetal, or metalloid? Metal Family Name: Alkali Metal Discoverer: Johann Arfvedson Date of Discovery: 1817 Melting Point: 180.5 °C Boiling Point: 1342 °C

4. Uses & other facts Interesting stories: It is the lightest metal on Earth. It’s also one of the elements that’s theorized to have form at the time of the Big Bang. How is it used? If you put water in it & dry it, then it becomes helium. It’s also used to make tritium, a type of battery. It can also be used to make ceramics, rubber products, dyes, glass, etc. Physical, chemical properties or unusual facts: Lithium has a melting point of 180.54°C and a boiling point of 1342°C. Its density is approximately half that of water. Metallic lithium is silvery in appearance. It reacts with water & sodium. It is also corrosive.

5. BORON

6. Basic File: Boron Element Name: Boron Chemical Symbol: B Atomic Number: 5 Atomic Mass: 10.811 amu Phase: Solid Classification: Metalloid Group: 13 Period: 2 Block: P Number of Protons/Neutrons: 5 Number of Electrons: 6 Color: Brownish Crystal Structure: Rhombohedral Date of Discovery: 1808 Discoverer: Sir Humphry Davy, J.L Gay-Lussac Melting Point: 2300.0 °C Boiling Point: 2550.0 °C

7. Bohr Diagram & Uses, Facts Number of Energy Levels: 2 First Energy Level (Electrons it contains):2 Second Energy Level (Electrons it contains):3 Obtained From: Kernite Uses 1: Heating Resistant Alloys Uses 2: Plant nutrient Physical, Chemical, Properties or unusual facts 1: It’s name comes from Borax and Carbon. Physical, Chemical, Properties or unusual facts 2: Boron is necessary plant nutrient, but over concentration of boron can be toxic to plants. Physical, Chemical, Properties or unusual facts 3: Boron is also used as insecticides and preservatives.

8. Beryllium

9. FILE Element name: Beryllium Element symbol: Be Atomic Number: 4 Atomic Mass: 9.01 amu Solid, liquid, or gas? Solid at 298 K Metal, nonmetal, or metalloid? Metal Family Name: Alkali Earth Metal Discoverer: Fredrich Wohler Date of Discovery: 1798 Melting Point: 1278 °C Boiling Point: 2970 °C

10. Uses, Facts How is it used: Beryllium is one of the lightest metal and has one of the highest melting points of any light metal. Beryllium metal is used principally in aerospace and defense applications because of its stiffness, light weight, and dimensional stability over a wide temperature range. Physical, chemical properties or unusual facts: Beryllium melting point 1278 °C and boiling point 2970 °C. beryllium's very low density, 1.85 g/cm3

11. Bohr Diagram Number of Electrons: 4 Number of Neutrons: 5 Number of Protons: 4