The properties of a few elements are given below:
Element A B C Melting point Atomic size 120 pm 131 pm 136 pm
Answer the following giving reasons:
Will the valencies of all the elements be same or different?
The properties of a few elements are given below:
| Element | A | B | C |
| Melting point | |||
| Atomic size | 120 pm | 131 pm | 136 pm |
Answer the following giving reasons:
Will the valencies of all the elements be same or different?
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. The groups have similar chemical properties. There are 7 periods and 18 groups in periodic table.
The elemental classification in the periodic table long form is electronic configuration.
Step-2:
Atomic size: From the given element C to A, atomic size decreases. So, it belongs to same period.
Melting point: From the given element C to A, the melting point decreases and belongs to same period.
Valency:
The electrons count in the outermost shell is valency.
Since the elements belongs to same period, the valency differs.
Final answer
Therefore, the valency of all the elements will be different.
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. The groups have similar chemical properties. There are 7 periods and 18 groups in periodic table.
The elemental classification in the periodic table long form is electronic configuration.
Step-2:
Atomic size: From the given element C to A, atomic size decreases. So, it belongs to same period.
Melting point: From the given element C to A, the melting point decreases and belongs to same period.
Valency:
The electrons count in the outermost shell is valency.
Since the elements belongs to same period, the valency differs.
Final answer
Therefore, the valency of all the elements will be different.
