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This question is about sodium and chlorine - AQA - GCSE Chemistry Combined Science - Question 2 - 2018 - Paper 1
Question 2
This question is about sodium and chlorine. Figure 2 shows the positions of sodium and chlorine in the periodic table. State one difference and one similarity in t... show full transcript
Worked Solution & Example Answer:This question is about sodium and chlorine - AQA - GCSE Chemistry Combined Science - Question 2 - 2018 - Paper 1
Step 1
Step 2
Describe what happens when a sodium atom reacts with a chlorine atom.
Answer
When a sodium atom reacts with a chlorine atom, the sodium atom loses one electron from its outer shell. This electron is transferred to the chlorine atom, which gains an electron. As a result, sodium becomes a positively charged ion (Na extsuperscript{+}) and chlorine becomes a negatively charged ion (Cl extsuperscript{-}). This transfer of electrons leads to the formation of the ionic compound sodium chloride (NaCl).
Step 3
Complete the reaction profile for the reaction between sodium and chlorine.
Answer
Relative energy
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Reactants Products
Progress of reaction
In the reaction profile, the energy of the reactants is higher than the products, indicating that the reaction is exothermic. The curve represents the energy change throughout the reaction.