Task 1 · easy
Mercury as an exception
The student says: Give me a counter-example.
Hint and solution →Original practice tasks · Chemistry · Class 8
Metals and non-metals — tasks with solutions
Start with the easier exercises and work your way up. Every task has a hint and a full step-by-step solution — try it on your own first, then unlock the solution and compare.
Easy
6
Medium
3
Hard
3
Task 2 · easy
Graphite and leadership
Isn't the sentence "no non-metal conductor" correct?
Hint and solution →Task 3 · easy
Metal a magnet
Is every metal strongly attracted by a magnet?
Hint and solution →Task 4 · easy
Sodium ion
What kind of ion creates sodium in a simple school model of ion compound?
Hint and solution →Task 5 · easy
Magnesium Jon
What kind of ion creates magnesium in a simple school model?
Hint and solution →Task 6 · medium
MgO cargo balance
Explain why one Mg2+ and one O2 - create an electrically inert MgO record.
Hint and solution →Task 7 · medium
Magnesium combustion balance
Balance Mg + O2 → MgO.
Hint and solution →Task 8 · hard
Aluminium oxide balance
Balance Al + O2 → Al2O3.
Hint and solution →Task 9 · easy
Coal combustion to CO2
Check if the equation C + O2 → CO2 is balanced.
Hint and solution →Task 10 · hard
Zinc and HCl balance sheet
Balance Zn + HCl → ZnCl2 + H2.
Hint and solution →Task 11 · medium
Metal and acid generalization
Based on the equation Zn + 2 HCl → ZnCl2 + H2 can you say that each metal reacts with each acid the same way?
Hint and solution →Task 12 · hard
Index or index?
The student wants to balance Mg + O2 → MgO by changing the product to MgO2. Why is this a mistake?
Hint and solution →Karta pracy do druku
Ten sam temat w wersji na kartkę: instrukcja, zadania i miejsce na odpowiedzi. Wydruk jest bezpłatny.
Otwórz kartę pracy →After the tasks
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