Ionic & Metallic Bonding Review

What is the basis of a metallic bond?

• the attraction of neutral metal atoms.
• the attraction between protons and neutrons.
• the attraction between positive metal ions and interlocking electrons.
• the attraction between positive metal ions and free floating electrons.

At room temperature, most metals are

• liquid
• solid
• gas
• an alloy

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NGSS.MS-PS1-4

What does malleable mean?

• able to be shaped
• will break easily
• can be used for wire
• is shiny

Electrons that are free to move in metals

• delocalized electrons
• oxidation number
• chemical bond
• salts

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What is the ability of a substance to be pulled into a thin strand?

• Malleability
• Ductility 
• Conductivity
• Solubility

Why do metals conduct

• They are shiny
• The electrons are held tightly within the lattice
• The electrons are delocalised and able to move
• The electrons are shared between two metal ions

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Magnesium bromide is an ionic compound with the chemical formula MgBr₂.  What does the "2" tell you?

• There are 2 bromide ions for every magnesium ion
• Bromide has a 2- charge
• Bromide has a 2+ charge
• There are 2 magnesium ions to every bromide ion

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NGSS.MS-PS1-1

What is the formula of Sodium oxide?

• Na2O
• NaO₂
• Na₂O₂
• Na₂O

What is the name of the compound with the chemical formula CrCl₃ ?

• chromium (III) chlorate

• chromium trichloride

• chromium(II) chloride

• chromium(III) chloride

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A formula unit can best be described as

• the chemical formula for an ionic compound

• a charged group of covalently bonded atoms

• the chemical formula for a molecule

• the arrangement of ions in an ioinc crystal