Chemistry H Midterm Practice Problems (Use Periodic Table!)

Go in order!

Ionic Compound Practice!

Name, write charges, and/or write formulas for each!

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Mg3P2

Name: Magnesium Phosphide

Cation:Mg(2+)

Anion: P(3-)

Potassium Oxide

Cation: K(+)

Anion: O(2-)

Formula: K2O

Copper (III) sulfide

Cation (found through calculation): Cu(3+/III)

Anion: S(2-)

Formula: Cu2S3

Bond Fe and SO4

Name: Iron(II) Sulfate

Cation (found through calculation): Fe(2+/II)

Anion: SO4(2-)

Formula: FeSO4

PbSO4

Name: Lead(II) Sulfate

Cation (found through calculation): Pb(2+/II)

Anion: SO4(2-)

Bohr Diagrams!

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Draw a Bohr diagram for an ion of O with a -2 charge and 8n

(8p+, 8n0, 10e-)

Draw a Bohr Diagram for Aluminum-27

(13p+, 14n0, 13e-)

Physical and Chemical properties and Changes, Elements, Compounds, and Mixtures

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Label as a chemical change or a physical change:

• Rusting

• Food spoiling

• Melting ice

• Burning paper

• boiling water

• Dissolving sugar in water

• Rusting C

• Food spoiling C

• Melting ice P

• Burning paper C

• Boiling water P

• Dissolving sugar in water P

Classify as element, compound, or mixture:

a) mixture (between elements)

b) element

c) compound

Classify as element, compound, or mixture:

• Na + Cl2

• Fe + KBr

• AlPO4

• P4

• Na + Cl2 Mixture (between elements)

• Fe + KBr Mixture (between elements and compounds)

• AlPO4 Compound

• P4 Element

Electronegativity practice

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Si and P

Difference: 0.3

Bond type: nonpolar covalent

Br and K

Difference: 2.2

Bond type: ionic

I and Rb

Difference: 0.9

Bond type: polar covalent

Covalent Compounds

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N2O3

Dinitrogen Trioxide

SCl5

Phosphorus Pentachloride

Tetraphosphorus Decoxide

P4O10

Nitrogen Monoxide

NO

I will put in more as we get practice Problems!

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