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George made a table of some of the elements and the charges of their ions from period 4.

Element: K, Charge: +2
Element: CA , Charge: +2
Element: GA, Charge: +3
Element: Se Charge: -2
Element: Br Charge: -1
Using the Periodic Table, what mistake did George make in his table?

1 answer

George made a mistake in the charges of the ions for potassium (K) and calcium (Ca).

  1. Potassium (K) is in Group 1 of the periodic table and typically forms a cation with a charge of +1, not +2. Therefore, the correct charge for potassium should be +1.

  2. Calcium (Ca) is in Group 2 and correctly has a charge of +2.

  3. Additionally, gallium (Ga) typically has a charge of +3, which is correct.

  4. Selenium (Se) in Group 16 usually forms an anion with a charge of -2, which is also correct.

  5. Bromine (Br), in Group 17, typically forms an anion with a charge of -1, which is correct.

In summary, the mistake in George's table lies with potassium (K), which should have a charge of +1 instead of +2.