Question

you might need an periodic table
which of these elements forms ions with the same charge as potassium ions?
choose 1 answer:
beryllium
selenium
bromine
cesium

Explanation:

• Potassium (\(K\)) is in Group 1 of the periodic table. Elements in Group 1 lose one electron to form \(+1\) ions (\(K^{+}\)).
• Cesium (\(Cs\)) is also in Group 1. It will lose one electron to form \(Cs^{+}\) ions.
• Beryllium (\(Be\)) is in Group 2. It loses two electrons to form \(Be^{2 +}\) ions.
• Selenium (\(Se\)) is in Group 16. It gains two electrons to form \(Se^{2-}\) ions.
• Bromine (\(Br\)) is in Group 17. It gains one electron to form \(Br^{-}\) ions.

Answer:

D. cesium