|
Criado por Robert Hebbs
mais de 9 anos atrás
|
|
Questão | Responda |
Why do atoms bond? | To get a stable full outershell of electrons |
What type of bonding to you get with a metal an a non-metal | Ionic Bonding |
What type of bonding do you get with two non-metals? | Covalent bonding |
What happens to a metal in ionic bonding? | It loses its outer shell electrons to form a positive ion |
What happens to a non metal in ionic bonding? | It gains electrons to get a full outer shell of electrons forming a negative ion |
What is an ion? | A charged particle (metals form positive ions, non-metals negative ions) |
What properties does an ionic compound have? | High melting point Only conduct electricity when molten or dissolved in water |
Why do ionic compound have high melting points? | They have a giant ionic lattice containing lots of strong ionic bonds which need to be broken with large amounts of energy |
Why do liquid and aqueous ionic compounds conduct electricity? (aqueous means they are dissolved in water) | Because their ions are free to move and carry charge. |
What happens to the electrons of atoms in covalent bonding? | The two atoms share electrons to get a full outershell |
What 2 types of covalent compounds are there? | Simple molecular & Giant covalent |
What are the properties of a simple molecular covalent compound | Low melting point Does not conduct electricity |
What are the properties of a giant covalent compound? | Very high melting points Do not conduct electricity except graphite & fullerenes |
What are the properties of diamond? | High melting point & hard (Giant covalent structure, lots of strong bonds) |
What are the properties of graphite? | High melting point (strong bonds) Conduct electricity (delocalised electrons) Slippy (layers can slide) |
What type of bonding occurs in metals? | Metallic bonding |
Why do metals conduct electricity? | Their outer shell electrons are delocalised and free to move carrying the charge |
What's the difference between a pure metal and an alloy | An alloy is a mixture of metals and is harder |
What is a nano particle? | A really really small particle |
Quer criar seus próprios Flashcards gratuitos com GoConqr? Saiba mais.