Name an element that has two shells, each one of which is completely filled with electrons.
Name an element that has two shells, each one of which is completely filled with electrons.
Step-1:
The elements in periodic table are placed in periods and groups. Periods are horizontal rows that has increasing atomic numbers. Groups are vertical columns. The groups have similar chemical properties. 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.
The shell with completely filled electrons mean the valence electrons are 8.
Step-2:
Number of valence electrons in the valence shell = 8
Number of valence electrons + 10= Number of group
So, the element belong to group 18.
Step-3:
Number of valence shell = 2
Number of valence shell = Number of period
So, the element belong to period 2.
Final answer:
Therefore, the element that has two shells and completely filled electrons is Neon (Ne). Neon belongs to period 2 and group 18.
Step-1:
The elements in periodic table are placed in periods and groups. Periods are horizontal rows that has increasing atomic numbers. Groups are vertical columns. The groups have similar chemical properties. 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.
The shell with completely filled electrons mean the valence electrons are 8.
Step-2:
Number of valence electrons in the valence shell = 8
Number of valence electrons + 10= Number of group
So, the element belong to group 18.
Step-3:
Number of valence shell = 2
Number of valence shell = Number of period
So, the element belong to period 2.
Final answer:
Therefore, the element that has two shells and completely filled electrons is Neon (Ne). Neon belongs to period 2 and group 18.
