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66 77 88 99 1010

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1616 1717 1818 1919 2020

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1.1. What is an electric What is an electric current ?current ?

A flow of electronsA flow of electrons

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2.2. What is an electrical What is an electrical CONDUCTORCONDUCTOR ? ?

A substance that A substance that allows electricity to allows electricity to

pass through itpass through it

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3.3. What is an electrical What is an electrical INSULATORINSULATOR ? ?

A substance that A substance that does NOT allow does NOT allow

electricity to pass electricity to pass through itthrough it

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4.4. What types of What types of substances conduct substances conduct

electricity ?electricity ?

MetalsMetalsGraphite (a form of Graphite (a form of

carbon)carbon)Molten ionic Molten ionic compoundscompounds

Solutions of ionic Solutions of ionic compundscompunds

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5.5. What types of What types of substances substances do NOT do NOT conduct electricity ?conduct electricity ?

Non - metalsNon - metalsSolid ionic compoundsSolid ionic compoundsCovalent compoundsCovalent compounds

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6.6. What are What are electrolytes ?electrolytes ?

Ionic compounds that Ionic compounds that conduct electricity (The conduct electricity (The compound decomposes)compound decomposes)

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7.7. Describe how Describe how electrolytes conduct electrolytes conduct

electricity?electricity?

The movement of ions to The movement of ions to electrodeselectrodes

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8.8. What type of particle What type of particle flows through electrolytes flows through electrolytes

during conduction?during conduction?

IonsIons

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9.9. What type of particle What type of particle flows through metals flows through metals during conduction?during conduction?

ElectronsElectrons

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10.10. How do metals How do metals conduct electricity ?conduct electricity ?

Electrons flow through the Electrons flow through the metal.metal.

The metal does NOT The metal does NOT change chemicallychange chemically

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11.11. Why do ionic Why do ionic solids NOT conduct solids NOT conduct

electricity ?electricity ?

The ions are not free to The ions are not free to movemove

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12.12. What happens to the What happens to the POSITIVEPOSITIVE ions when an ions when an electrolyte conducts?electrolyte conducts?

The positive ions are The positive ions are attracted to the negative attracted to the negative electrode. Here they GAIN electrode. Here they GAIN

electrons. This changes electrons. This changes them into ATOMS.them into ATOMS.eg eg CuCu2+2+ + 2e + 2e CuCu

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13.13. What happens to the What happens to the NEGATIVE NEGATIVE ions when an ions when an electrolyte conducts?electrolyte conducts?

The negative ions are The negative ions are attracted to the positve attracted to the positve

electrode. Here they LOSE electrode. Here they LOSE electrons. This changes electrons. This changes them into ATOMS which them into ATOMS which

can join to form molecules.can join to form molecules.eg eg 2Cl2Cl-- ClCl22 + 2e + 2e

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14.14. Describe the Describe the structure of an IONIC structure of an IONIC

solidsolid

An ionic solid consists of a An ionic solid consists of a network or LATTICE of network or LATTICE of oppositely charged ionsoppositely charged ions

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15.15. Describe the Describe the electron electron

arrangement of ions?arrangement of ions?

The electron arrangement The electron arrangement of a Noble gas atom. This of a Noble gas atom. This electron arrangement is electron arrangement is

stablestable

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16.16. Why do molten Why do molten ionic ionic compounds compounds

conduct but conduct but ionic solids ionic solids do not ?do not ?

The ions in the The ions in the MOLTENMOLTEN substance are substance are FREE TO FREE TO MOVEMOVE. The ions cannot . The ions cannot

move in a solid.move in a solid.

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17.17. Do ionic solids Do ionic solids dissolve in waterdissolve in water??

YES .Most Ionic solids YES .Most Ionic solids DISSOLVE in water. The DISSOLVE in water. The

lattice breaks up and the lattice breaks up and the ions spread out. ions spread out.

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18.18. Which covalent Which covalent compounds conduct compounds conduct electricity?electricity?

NONE!NONE!

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19.19.What are the What are the typicaltypical STATES of STATES of ionic and ionic and covalent compoundscovalent compounds??

All Ionic compounds are All Ionic compounds are SOLIDS. Covalent SOLIDS. Covalent

compounds can be liquids, compounds can be liquids, gases or solids with low gases or solids with low

melting pointsmelting points

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20.20.What are the products What are the products of the of the electrolysis of electrolysis of

copper chloridecopper chloride??

COPPERCOPPER metal at the metal at the negative electrode and negative electrode and CHLORINECHLORINE gas at the gas at the positive electrode.positive electrode.

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