Chemistry bonding flashcards 0.0 / 5 ? ChemistryBonding & shapesASAQA Created by: JamesCreated on: 22-01-14 21:12 What happens in a dative covalent bond? The shared pair of electrons come from only one of the bonding atoms. 1 of 12 Name the three main factors that affect the strength of a metallic bond. 1. Number of protons/Nuclear charge 2. Number of delocalised electrons 3. Size of the ion 2 of 12 Name the four main types of crystal structure. Metallic, Ionic, Simple molecular and Macromolecular. 3 of 12 What is the definition of Electronegativity? Electronegativity is the relative tendency of an atom in a covalent bond in a molecule to attract electrons in a covalent bond to itself. 4 of 12 By how much do lone pairs of electrons repel the atoms in molecules? 2.5 degrees 5 of 12 Where do Van der Waal's forces occur?ple They occur between all simple covalent molecules and the separate atoms in noble gases. 6 of 12 Which of these bonds is the strongest: Dipole-Dipole, Van der Waal's, Hydrogen. Hydrogen bonding 7 of 12 With which three elements does Hydrogen bonding occur? Nitrogen, Oxygen and Flourine. 8 of 12 How do you display the dipoles in a molecule on a diagram? δ + δ – (Delta positive/negative) 9 of 12 How would you describe the shape of a water molecule? Bent 10 of 12 What is the definition of a metallic bond? A metallic bond is the electrostatic force of attraction between the positive metal ions and the delocalised electrons 11 of 12 What is the most electronegative element? Flourine 12 of 12
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