Unit 1 - Part 1
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| What are all elements made up of? | Atoms
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| What is the centre of an atom called? | Nucleus
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| What are the three sub-atomic particles called? | Protons,
Electrons,
Neutrons
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| What are the two sub-atomic particles in the nucleus? | Protons,
Neutrons
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| Where are the electrons found? | Circling the nucleus on energy levels.
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| Why are atoms neutral? | The number of protons equals the number of electrons.
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| What is the atomic number? | It equals to the number of protons in the atom.
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| What is the atomic mass? | It equals to the number of protons + number of neutrons
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| How are electrons arranged? | In energy levels round the nucleus.
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| How many electrons can the first energy level hold? | 2
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| How many electrons can the second energy level hold? | 8
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| What is Isotopes? | Atoms of the same element but with a different number of neutrons.
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| Explain Covalent Bonding | It is the sharing of electrons to make two atoms stable.
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| What are the 7 diatomic molecules? | Hydrogen,
Oxygen,
Nitrogen,
Fluorine,
Chlorine,
Bromine,
Iodine
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| What diatomic molecules have a single bond? | Hydrogen,
Fluorine,
Chlorine,
Bromine,
Iodine
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| What diatomic molecules have a double bond? | Oxygen
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| What diatomic molecules have a triple bond? | Nitrogen
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| What is a molecule? | It is two or more atoms held together by covalent bonds.
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| Do metals form covalent bonds? | No, only non-metals form covalent bonds.
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| What are the valencies of Groups 1,2,3,4,5,6 and 7? | Group 1= 1
Group 2= 2
Group 3= 3
Group 4= 4
Group 5= 3
Group 6= 2
Group 7= 1
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| What is the prefix of 1 atom? | mon-
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| What is the prefix of 2 atoms? | di-
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| What is the prefix of 3 atoms? | tri-
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| What is the prefix of 4 atoms? | tetra-
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| What is the prefix of 5 atoms? | penta-
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| What is the prefix of 6 atoms? | hexa-
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| What is the prefix of 7 atoms? | hepta
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| What is the prefix of 8 atoms? | octa
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| What is the prefix of 9 atoms? | nona
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| What is the prefix of 10 atoms? | deca
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| Explain Conductor | A material that allows the flow of electricity.
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| Explain non-conductor (or insulator) | A material that does not allow the flow of electricity.
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| Explain Metallic Bonding | Strong attraction between closely packed positive metal ions and a 'sea' of delocalised electrons. The attraction between the metal ions and the delocalised electrons must be overcome to melt or to boil a metal.
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| For an electric current to flow, what are the two things needed? | -Charged Particles
-The charged particles must be able to move
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| Explain Ionic Bonding | It is when non-metals steal electrons from metals.
Non-metals gain electrons
Metals lose electrons
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| What are the charged particles in an ionic compound called? | Ions
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| What is Electrolysis? | It is the breaking up of a compound using electricity.
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| What is Electrolyte? | A liquid that conducts electricity by the movement of ions.
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| What are covalent networks? | A few covalent compounds such as silicon dioxide that have very high melting points.
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