Chapter 5, Problem 5.121SP

Interpretation Introduction

Interpretation:

The increasing order of the atomic radius of Rb, Cl, As and K needs to be determined.

Concept introduction:

An atom consists of three sub-atomic particles; electrons, protons, and neutrons. Bohr’s model purposed the concept of energy levels around the nucleus. It was the first most accepted atomic model. The quantum mechanical model is based on certain concepts like quantum numbers, the Heisenberg uncertainty principle, etc. The atomic structure can be described with the help of these principals and atomic models.

All known elements are placed in the periodic table according to their atomic number. The atomic number of elements increases from left to right by 1 unit in the periodic table. The vertical columns of the periodic table are called groups.