The validation of the fact that bromine and mercury are not in the same group is to be stated. Concept introduction: The elements in a modern periodic table are arranged in increasing order of their atomic number . In the modern periodic table, the horizontal rows are known as periods and vertical columns are known as groups. There are seven periods and eighteenth groups in modern periodic table.

Question

Part B Mendeleev placed thallium (TI) in the same group as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). However, the modern periodic table doesn't place thallium in this group. Use the periodic table to find the properties of thallium. Explain why Mendeleev might have grouped thallium in the same group as lithium and sodium. Also explain how thallium is different from the other five elements. B I U x X, Font Sizes A 三星 E 三三囲。 Characters used: 0/ 15000 VO 5:57 !!!

Answer 1

Question

Chapter 3, Problem 3.47E

Interpretation Introduction

Interpretation:

The validation of the fact that bromine and mercury are not in the same group is to be stated.

Concept introduction:

The elements in a modern periodic table are arranged in increasing order of their atomic number. In the modern periodic table, the horizontal rows are known as periods and vertical columns are known as groups. There are seven periods and eighteenth groups in modern periodic table.

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Part B Mendeleev placed thallium (TI) in the same group as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), and cesium (Cs). However, the modern periodic table doesn't place thallium in this group. Use the periodic table to find the properties of thallium. Explain why Mendeleev might have grouped thallium in the same group as lithium and sodium. Also explain how thallium is different from the other five elements. B I U x X, Font Sizes A 三星 E 三三囲。 Characters used: 0/ 15000 VO 5:57 !!!

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Select all the elements whose elemental forms would exist as networks: Hydrogen Helium Lithium Beryllium Boron Carbon Nitrogen Oxygen Fluorine Neon