Covalent and ionic bonding

• Cov bonding takes place Between what two types of elements


  Non metals
• Ionic bonding takes place with two of what type of elements


  Metal and non metal
• Why do atoms take place in bonding

  To achieve full outer shells
• How many electrons does mg lose when taking place in ionic bonding

  2 as there is only 2 on the outer shell
• What are negative ions called

  Anions
• What are positive ions called


  Cations
• What's the difference between a ion and a icotope

  Icotopes are atoms that have the same number of protons but a dif number of neutrons. An ion is a atom which has lost or gained an electron
• Describe what happenes when (atom A) reacts with (Atom B) if atom A has one electron on its outer shell and atom B has 7

  The electron on Atom A outer shell will be transferred to Atom B in order for both atom to have stable outer shells. Atom A becomes a Cation as it has lost a negatively charged electron so is mow more positive and Atom B will become a Anion as it has gained a electron so is now ,ore negatively charged
• How are atoms held together in a covalent bond?

  By the electro static force of attraction between the shared pares of electrons and the nuclei of the atoms bonding.
• What's a limitation of the 2D stick model

  Doesn't show the true shape of the molecules
• What's the pros of a 3D model

  Has the correct degrees and has a tetrahedral shape
• What are some properties of ionic compounds

  Have a Hugh melting and boiling point because lots of energy is required to break many strong bonds, when melted or dissolved in water ionic compounds conduct electricity because the ions are free to move and carry charge. They can't conduct electricity when it is a solid because the atoms are fixed into place
• How do u work out relative atomic mass of a isotope

  ∑ isotope mass x isotope abundance / 100.