Which element on the periodic table typically forms a +1 ion?

• A. Al
• B. Na
• C. O
• D. Mg

Answer: (B)

Verified step by step guidance

1. Identify the elements given in the problem: Al (Aluminum), Na (Sodium), O (Oxygen), and Mg (Magnesium).
2. Recall that elements tend to form ions by losing or gaining electrons to achieve a stable electron configuration, often resembling the nearest noble gas.
3. Understand that elements in Group 1 of the periodic table (alkali metals) typically lose one electron to form a +1 ion.
4. Recognize that Sodium (Na) is in Group 1, so it commonly forms a +1 ion by losing one electron.
5. Contrast this with the other elements: Aluminum (Al) typically forms +3 ions, Oxygen (O) typically forms -2 ions, and Magnesium (Mg) typically forms +2 ions.