Question

question 12
which of the following elements has the most metallic character?
ca
be
na
mg
k

Explanation:

Metallic character increases down a group and decreases across a period from left to right. Among the given elements, K (potassium) is in Group 1 and Period 4. Ca is in Group 2 and Period 4. Na is in Group 1 and Period 3. Mg is in Group 2 and Period 3. Be is in Group 2 and Period 2. Since K is further down the group compared to Na and further to the left compared to Ca and Mg (as Group 1 elements are more metallic than Group 2 in the same period), K has the most metallic character.

Answer:

K