Chemistry additional chapter 1 0.0 / 5 ? ChemistryCalculations, moles and yieldGCSEAQA Created by: rebeccamariaCreated on: 14-01-16 23:35 What are ions? Ions are electrically charged particles formed when atoms lose or gain electrons. 1 of 25 Which atoms usually gain electrons to form negative ions? Non-metal 2 of 25 Which atoms usually gain electrons to form positivie ions? Metals 3 of 25 What ionic bonding? Ionic bonding is when atoms lose or gain an electron to form charged particles which are then strongly attracted to each other 4 of 25 What do metal atoms do? Lose the electron(s), in their highest energy level and become positively charged ion 5 of 25 What do non-metal atoms do? Gain an electron, from another atom to become negatively charged ions 6 of 25 When you lose an atom what ion sign are you? A plus (+0 7 of 25 When you gain an atom what ion sign are you? A minus (-) 8 of 25 What are atoms that have lost or gained an electron called? Ions 9 of 25 What are ionic bonds between? A metal and non metal 10 of 25 Do elements from group 7 form positive ions or negative ions? Positive (lose electrons) 11 of 25 Do elements from group 1 form negative ions or negative ions? Negative (gain electrons) 12 of 25 Sodium chloride has a giant ionic structure. Does it have a high or low boiling point? Low boiling point 13 of 25 What is the atomic number? Is the number of protons 14 of 25 What is the mass number? Total of protons and neutrons 15 of 25 Explain what is meant by the term isotope They are different atomic forms of the same element, which have the same number of protons but a different number of neutrons 16 of 25 Name to types of isotopes Carbon 12 and Carbon 14 17 of 25 Give three properties of ionic bodning 1. High melting and boiling points due to the s 18 of 25 Why do ionic bonds have a high melting and boiling point? Due to stong electrostatic forces between the oppositely ions 19 of 25 Explain why giant ionic structures such as magnesium fluoride don't melt easily Because, there are strong electrostatic forces between ion, so a large amount of energy is needed to overcome these forces 20 of 25 When can ionic bonds conduct electricity? When molten or dissolved in water 21 of 25 What happens when ionic bonds are molten or dissolved in water? The ions are free to move and they carry an electric current. Which allows them to conduct electricity 22 of 25 How are ionic bond held together? They are held together by strong electrostatic forces between oppositely charged ions 23 of 25 What is a covalent bond? Is a strong bond between two non-metal atoms. It consists of a shared pair of electrons. 24 of 25 What are covalent bonds between? Metal and non-metals 25 of 25
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