1. (10-11) F3 Chemistry Individual Project Work Ionic & Covalent compounds Name: Esther Wong Class: 3C Class no: (35) (Electron diagram)

2. Boiling point & Melting point High Boiling point : 3600 ℃ & Melting point : 2827 ± 30 ℃ Color & Physical stateWhite, tasteless powder (solid) Density3.58 g/ cm3 Solubility in waterVery slightly ( 0.086 g/ L ) Electrical conductivityIt is a good electrical insulator Molecular Weight40.31 g/mol

3. Reactivity towards Water and Acid  Water: it will form Magnesium Hydroxide  Acid: gives Magnesium Nitrate and water. Storage & Laboratory preparation  Store in cool and dry places. Keep away from strong acids.  Don’t touch it with bare skin.  Make sure all the touching surfaces are completely dry.  Wash thoroughly after handing it.  It is basic  Both oxidising and reducing.

4.  Cause eyes irritation.  Cause respiratory tract ( 呼吸道 ) irritation.  Inhalation ( 吸入 ) of the fumes of MgO may cause fever.  The bright light produced will emit harmful intensity of UV light.

5. EyesGently lift the eyelids & flush continuously with water. Skin (bare skin)Flush with PLENTY of water, remove the contaminated clothing. IngestionDON’T induce vomiting or drink water! InhalationRemove to fresh air environment

6.  Medicine  Firework  Cosmetics  Coating  Fertilizer ( 肥料 )

7.  Abrasives ( 磨具 )  Desiccant ( 乾燥劑 )  Cement ( 水泥 )

8.  Different states :

9. http://en.wikipedia.org/wiki/Magnesium_oxide http://www.magnesiaspecialties.com/students.htm http://www.ehow.com/about_4709013_common-uses-magnesium-oxide.html http://www.magnesiaspecialties.com/students-mining.htm http://kidshealth.org/parent/medications/magnesium_oxide.html