Bonding

• What is an ion?

  A charged particle that has either lost or gained electrons and either has a negative or positive charge
• Why do atoms lose or gain electrons?

  To achieve a full outer shell
• Do non metals lose or gain electron?


  Gain electrons
• Do metals lose or gain electrons?


  Lose electrons
• Do non metals form negatively or positively charged ions?


  Negatively charged
• Do metals form negatively or positively charged ions?


  Positively charged
• What is ionic bonding between?

  Metals and non metals
• What is covalent bonding between?

  Non metals
• How are covalent bonds formed?

  When 2 atoms share a pair of electrons
• What are metallic bonds between?

  Metals
• How are metallic bonds formed?

  Electrons in the outer shell become delocalised
• How is an ionic lattice formed?

  oppostiely charged ions attract, held together by srotng electrostatic forces of attraction
• What is Avogadro's constant?

  6.022 x 10^23 (number of particles in one mole of a substance)
• What is the equation for moles?

  moles = mass in grams/Mr
• What is the unit for moles?

  mol
• What does the law of conservation of mass state?

  No atoms are lost or gained during a chemical reaction, only rearranged