Chemical Bonding - Ionic Bonds

Metals _________ electrons to non-metals when they form an ionic bond.

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Magnesium loses electrons to form _____ ions in MgCl2

• Mg

• Mg2+

• Mg4+

• Mg2-

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NGSS.HS-PS1-2

Which one of the following is the correct dot and cross diagram for Na2O?

• A

• B

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Magnesium oxide is used to line the refractories in the furnace as it has

• High boiling point

• High melting point

• Able to conduct electricity

• Able to dissolve in water

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NGSS.HS-PS1-1

Ionic compounds have high melting point due to the _____. Which statement best describes the answer?

• Strong ionic bonds between the ions

• Strong electrostatic forces of attractions between the oppositely charged ions

• Strong covalent bonds between the ions

• Strong attractive forces between the oppositely charged ions

Solid sodium chloride does not conduct electricity in the solid state as

• the oppositely charged ions are held in fixed positions by strong covalent bonds

• the oppositely charged ions are held in fixed positions by strong electrostatic forces of attractions

• the particles are held together by strong ionic bonds

• the ions are held in position by attractive forcesp

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NGSS.HS-PS2-4

Which of the following is a good electrolyte?

An electrolyte contains particles that is able to conduct electricity.

• Solid aluminium oxide

• Solid carbon dioxide

• Liquid lead(II) bromide

• Aqueous lead(II) sulfate

Molten magnesium oxide can conduct electricity as it contains

• free moving electrons that move to carry electrical charges

• free electrons that move to carry electrical charges

• free moving ions that move to carry electrical charges

• free moving molecules that move to carry electrical charges

Most ionic compounds are soluble in

• ethanol

• organic solvents

• water

• propanol