(a) Interpretation: To arrange the given set of species in order of their decreasing radius. Ca, Mg, Si, C Concept introduction: The Modern Periodic law states that the physical and chemical properties of the elements are a periodic function of their atomic numbers . This means that changes in the chemical properties of various elements present in the modern periodic table are due to their atomic numbers. Atomic number of an element gives the total number or electrons or protons present in that atom. The main cause of periodicity is the repetition of similar outer electronic configuration after regular intervals.

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Chapter 6, Problem 59QAP

Interpretation Introduction

(a)

Interpretation:

To arrange the given set of species in order of their decreasing radius.

Ca, Mg, Si, C

Concept introduction:

The Modern Periodic law states that the physical and chemical properties of the elements are a periodic function of their atomic numbers. This means that changes in the chemical properties of various elements present in the modern periodic table are due to their atomic numbers. Atomic number of an element gives the total number or electrons or protons present in that atom. The main cause of periodicity is the repetition of similar outer electronic configuration after regular intervals.

Interpretation Introduction

(b)

Interpretation:

To arrange the given set of species in order of their decreasing radius.

Sr, I, Br, Cl

Concept introduction:

The Modern Periodic law states that the physical and chemical properties of the elements are a periodic function of their atomic numbers. This means that changes in the chemical properties of various elements present in the modern periodic table are due to their atomic numbers. Atomic number of an element gives the total number or electrons or protons present in that atom. The main cause of periodicity is the repetition of similar outer electronic configuration after regular intervals.

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