Unit 1 - Chemistry - Structure and Bonding 0.0 / 5 ? Applied ScienceStructure and Bonding BTEC NationalAQA Created by: Hannah Marie WilliamsonCreated on: 24-05-19 14:38 State the formula for the common anions Sulfate - SO4 2- Carbonate - CO3 2- Nitrate - NO2- Hydroxide OH- 1 of 10 State the formula for the common cations Magnesium - Mg 2+ Sodium - Na+ 2 of 10 Describe, in terms of electron transfer, how Magnesium(Mg) and Oxygen (O) react to form MgO Mg loses electrons to become positive ion O gains 2 electrons to become negative ion. 3 of 10 Why do ionic compounds have high melting and boiling points? Strong electrostatic forces between oppositely charged ions which require a lot of energy to break. 4 of 10 Describe the structure of diamond. Each C is bonded to 4C atoms in a giant covalent structure. 5 of 10 Explain the properties of diamond. High melting and boiling point as it takes a lot of energy to break bonds. Strong. Doesn't conduct electricity as no free electrons. 6 of 10 Describe the structure of graphite. In layers with 3 carbon bonds. Weak intermolecular forces between layers. 7 of 10 Why is graphite soft? It is in layers which slide over each other. 8 of 10 Why does graphite conduct electricity? Because it has a delocalised electron and it carries a current. 9 of 10 How strong are the forces between covalent molecules? (Intermolecular forces) Weak. 10 of 10
Comments
No comments have yet been made