Name two elements each one of which has two electrons in its outermost shell.
Name two elements each one of which has two electrons in its outermost shell.
Step-1: Introduction
The elements in periodic table are placed in periods and groups. Periods are horizontal rows that has increasing atomic numbers. Groups are vertical columns. There are 7 periods and 18 groups in periodic table. The outermost shell is the valence shell of the element. The elements in groups have similar electronic configuration of the valence shell.
Step-2: To find the valence electrons
Number of valence electrons in the outermost shell = 2
Number of valence electrons = Number of groups
Since the valence electron is 2, the elements belongs to group 2.
Step-3: Group 2 elements
The group 2 has six elements. This group is also called as alkaline earth metals because they form basic hydroxides.
The two elements that has two electrons in its outermost shell are Beryllium () and Magnesium ().
Step-4: Final answer
Therefore, two elements that has two electrons in its outermost shell are Beryllium and Magnesium.
Step-1: Introduction
The elements in periodic table are placed in periods and groups. Periods are horizontal rows that has increasing atomic numbers. Groups are vertical columns. There are 7 periods and 18 groups in periodic table. The outermost shell is the valence shell of the element. The elements in groups have similar electronic configuration of the valence shell.
Step-2: To find the valence electrons
Number of valence electrons in the outermost shell = 2
Number of valence electrons = Number of groups
Since the valence electron is 2, the elements belongs to group 2.
Step-3: Group 2 elements
The group 2 has six elements. This group is also called as alkaline earth metals because they form basic hydroxides.
The two elements that has two electrons in its outermost shell are Beryllium () and Magnesium ().
Step-4: Final answer
Therefore, two elements that has two electrons in its outermost shell are Beryllium and Magnesium.
