Respuesta :
it's b. calcium
because the outer electron structure in all of that element is similar, they have the same chemical and physical properties.
because the outer electron structure in all of that element is similar, they have the same chemical and physical properties.
Answer: The correct answer is Option B.
Explanation:
Beryllium is the 4th element of the periodic table having electronic configuration [tex]1s^22s^2[/tex]. This element belongs to Group 2 of the periodic table.
Elements that belong to same group show similar chemical properties because they have same number of valence electrons.
For the given options:
Option A: Hydrogen
This element belong to group 1 of the periodic table.
Option B: Calcium
This element belong to group 2 of the periodic table. Thus, this will show similar chemical properties to beryllium.
Option C: Lithium
This element belong to group 1 of the periodic table.
Option D: Boron
This element belong to group 13 of the periodic table.
Hence, the correct answer is Option B.