34 Why do atoms lose, gain or share electrons? To get a full outer shell Structure and Bonding - To get a full outer shell, If an atom loses one electron, what charge will it have? - +1, If an atom loses two electrons, what charge will it have? - +2, If an atom gains one electron, what charge will it have? - -1, If an atom gains two electrons, what charge will it have? - -2, What is an atom which has lost or gained electrons called? - An ion, What kind of bond is formed when atoms transfer electrons - An ionic bond, What is the name for a substance made of lots of positive and negative ions? - Giant ionic lattice, Give two properties of giant ionic lattices - High melting point, only conduct electricity if melted or dissolved, What kind of bond is formed when atoms share electrons - A covalent bond, What kind of substance is formed from billions of atoms with covalent bonds? - Giant covalent, Name two properties of giant covalent substances - High melting point, don't conduct electricity, What is the giant covalent substance that can conduct electricity called? - Graphite, What kind of substance is formed from lots of small molecules? - Simple molecular, Name two properties of simple molecular substances - Low melting point, don't conduct electricity, What kind of bonding occurs between metal atoms only? - Metallic, Give two properties of metals - Easy to bend, conduct electricity, Why do graphite and metals conduct electricity? - They have delocalised electrons, What are the four types of substance? - Giant ionic lattice, giant covalent, simple molecular, metallic, Name an example of a simple molecule. - Water, hydrogen, methane, oxygen, carbon dioxide, ammonia, nitrogen, chlorine, hydrogen chloride, Name an example of a giant covalent substance. - Diamond, graphite, silicon dioxide,

Unit 2 – Structure and Bonding Qs 34-54

by
Print
Embed

Leaderboard

Visual style

Options

Switch template

Continue editing: ?