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Which of the following elements is most likely to form a +1 ion?

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Question: Which of the following elements is most likely to form a +1 ion?

Options:

  1. Calcium
  2. Potassium
  3. Aluminum
  4. Bromine

Correct Answer: Potassium

Solution: 

Potassium is an alkali metal and typically forms a +1 ion.

Which of the following elements is most likely to form a +1 ion?

Practice Questions

Q1
Which of the following elements is most likely to form a +1 ion?
  1. Calcium
  2. Potassium
  3. Aluminum
  4. Bromine

Questions & Step-by-Step Solutions

Which of the following elements is most likely to form a +1 ion?
Correct Answer: Potassium
  • Step 1: Understand what an ion is. An ion is an atom that has gained or lost electrons, giving it a charge.
  • Step 2: Know that a +1 ion means the atom has lost one electron.
  • Step 3: Identify the group of elements called alkali metals. These are found in Group 1 of the periodic table.
  • Step 4: Recognize that alkali metals, like potassium, easily lose one electron to form a +1 ion.
  • Step 5: Conclude that potassium is most likely to form a +1 ion because it is an alkali metal.
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