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Chapter 4: Q. 4.66 (page 126)

Fill in the following blanks using larger or smaller, higher or lower. Mg has a ______ atomic size and a ______ ionization energy than Cs.

Short Answer

Expert verified

Mg has smaller atomic size and a higher ionization energy than Cs.

Step by step solution

01

Given Information

We have to find out whether Mg has larger atomic size or smaller atomic size than Cs and also if it has high ionization energy or less ionization energy than Cs.

02

Explanation

Moving left to right in a period, atomic size decreases due to an increase in effective nuclear charge and ionization energy increases.

Mg is in 2ndgroup and 3rdperiod while Cs is in 1stgroup and 6thperiod.

This shows that Mg has a smaller atomic size than Cs and a higher ionization energy than Cs.

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