Rubidium is found in Group 1 of the Periodic Table - OCR Gateway - GCSE Chemistry: Combined Science - Question 3 - 2021 - Paper 10
Question 3
Rubidium is found in Group 1 of the Periodic Table.
Bromine is found in Group 7.
Rubidium and bromine react together to form an ionic compound.
Which row shows the e... show full transcript
Worked Solution & Example Answer:Rubidium is found in Group 1 of the Periodic Table - OCR Gateway - GCSE Chemistry: Combined Science - Question 3 - 2021 - Paper 10
Step 1
Electron change for rubidium
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Answer
Rubidium (Rb) is an alkali metal in Group 1, which means it has one electron in its outer shell. To achieve a stable electron configuration, rubidium will lose this electron during the reaction with bromine. Thus, the correct electron change for rubidium is: Electron lost.
Step 2
Formula of a rubidium ion
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Answer
When rubidium loses one electron, it forms a positively charged ion (cation). The resulting ion is denoted as Rb⁺. Therefore, the formula of the rubidium ion is Rb⁺.
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