1. Easy: Grade C: Put these words in order to make a word equation: Calcium oxide, Calcium carbonate, carbon dioxide, +,  ____________________________  __________________________ + ______________________ Grade B: Put these symbols in order to make a symbol equation: CO 2, CaCO 3, CaO, +,  _____________  __________________ + __________________ Grade A: Complete these word equations. Look at the pattern in the ones you’ve written above. Magnesium Carbonate  _________________________________ + carbon dioxide Copper Carbonate  Copper Oxide + ____________________________ Grade A*:Put these symbols in the right order: MgO, CO 2, MgCO 3 ________________  __________________ + __________________ Easy: Grade C: Put these words in order to make a word equation: Calcium oxide, Calcium carbonate, carbon dioxide, +,  ____________________________  __________________________ + ______________________ Grade B: Put these symbols in order to make a symbol equation: CO 2, CaCO 3, CaO, +,  _____________  __________________ + __________________ Grade A: Complete these word equations. Look at the pattern in the ones you’ve written above. Magnesium Carbonate  _________________________________ + carbon dioxide Copper Carbonate  Copper Oxide + ____________________________ Grade A*:Put these symbols in the right order: MgO, CO 2, MgCO 3 ________________  __________________ + __________________ Easy: Grade C: Put these words in order to make a word equation: Calcium oxide, Calcium carbonate, carbon dioxide, +,  ____________________________  __________________________ + ______________________ Grade B: Put these symbols in order to make a symbol equation: CO 2, CaCO 3, CaO, +,  _____________  __________________ + __________________ Grade A: Complete these word equations. Look at the pattern in the ones you’ve written above. Magnesium Carbonate  _________________________________ + carbon dioxide Copper Carbonate  Copper Oxide + ____________________________ Grade A*:Put these symbols in the right order: MgO, CO 2, MgCO 3 ________________  __________________ + __________________

2. Medium: Grade C: Word equation for thermal decomposition of calcium carbonate C_____________ C _________  C_________ O_________ + C______________ D_________ Grade B: Put these symbols in order to make a symbol equation: CO 2, CaCO 3, CaO, +,  __________________  _______________ + ________________ Grade A: What do the following carbonates decompose to form? Magnesium carbonate  M _____________ O____________ + C _______________ D _______________ Copper carbonate  C__________________ O______________ + C__________________D____________ Sodium carbonate  S_________________ O_______________ + C_________________ D_____________ Grade A*: Put these symbols in the right order: MgO, CO 2, MgCO 3 ________________  __________________ + __________________ Now write a symbol equation for Copper carbonate: Medium: Grade C: Word equation for thermal decomposition of calcium carbonate C_____________ C _________  C_________ O_________ + C______________ D_________ Grade B: Put these symbols in order to make a symbol equation: CO 2, CaCO 3, CaO, +,  __________________  _______________ + ________________ Grade A: What do the following carbonates decompose to form? Magnesium carbonate  M _____________ O____________ + C _______________ D _______________ Copper carbonate  C__________________ O______________ + C__________________D____________ Sodium carbonate  S_________________ O_______________ + C_________________ D_____________ Grade A*: Put these symbols in the right order: MgO, CO 2, MgCO 3 ________________  __________________ + __________________ Now write a symbol equation for Copper carbonate:

3. Hard: Grade C: Calcium carbonate  Grade B: Write a symbol equation.. Grade A: What do the following carbonates decompose to form? Magnesium carbonate  Copper carbonate  Sodium carbonate  Grade A*: Write symbol equations for the carbonates you looked at above (The formula for sodium oxide is Na 2 O and sodium carbonate is Na 2 CO 3 ) Stretch: Can you explain using your knowledge of ionic bonding why sodium oxide has the formula Na 2 O. Hard: Grade C: Calcium carbonate  Grade B: Write a symbol equation.. Grade A: What do the following carbonates decompose to form? Magnesium carbonate  Copper carbonate  Sodium carbonate  Grade A*: Write symbol equations for the carbonates you looked at above (The formula for sodium oxide is Na 2 O and sodium carbonate is Na 2 CO 3 ) Stretch: Can you explain using your knowledge of ionic bonding why sodium oxide has the formula Na 2 O. Hard: Grade C: Calcium carbonate  Grade B: Write a symbol equation.. Grade A: What do the following carbonates decompose to form? Magnesium carbonate  Copper carbonate  Sodium carbonate  Grade A*: Write symbol equations for the carbonates you looked at above (The formula for sodium oxide is Na 2 O and sodium carbonate is Na 2 CO 3 ) Stretch: Can you explain using your knowledge of ionic bonding why sodium oxide has the formula Na 2 O. Hard: Grade C: Calcium carbonate  Grade B: Write a symbol equation.. Grade A: What do the following carbonates decompose to form? Magnesium carbonate  Copper carbonate  Sodium carbonate  Grade A*: Write symbol equations for the carbonates you looked at above (The formula for sodium oxide is Na 2 O and sodium carbonate is Na 2 CO 3 ) Stretch: Can you explain using your knowledge of ionic bonding why sodium oxide has the formula Na 2 O.