Select the element that would have properties similar to Mn (atomic number 25).GaKrCaCr

To determine the element that would have properties similar to manganese (Mn, atomic number 25), we first need to consider the periodic table and the characteristics of manganese.

Step 1: Identify the Position of Manganese

Manganese is located in Group 7 of the periodic table, and it is a transition metal. Transition metals exhibit similar properties due to their partially filled d-subshells.

Step 2: Analyze the Given Options

The options provided are:

1. Ga (Gallium, atomic number 31)
2. Kr (Krypton, atomic number 36)
3. Ca (Calcium, atomic number 20)
4. Cr (Chromium, atomic number 24)

Step 3: Compare the Elements

• Ga (Gallium): A post-transition metal, which is in Group 13. It does not share many properties with Mn.
• Kr (Krypton): A noble gas from Group 18, with distinct properties, primarily inert and does not conduct electricity.
• Ca (Calcium): An alkaline earth metal in Group 2, which has very different properties than transition metals.
• Cr (Chromium): A transition metal in Group 6, closely related in properties to Mn due to being in the same category and having relatively similar electronic configurations.

Final Answer

The element that would have properties similar to Mn (Manganese) is Cr (Chromium).