To determine the noble gas which is relatively present in large concentration in the atmosphere. Concept Introduction: Periodic table is arrangement of different elements with the help of columns and rows in order to characterize elements with similar properties in same groups such as alkali metals, alkaline earth metals, halides, noble gases, transition elements etc. In the periodic table, columns represent groups and rows represents periods. The elements of group 18, which are known as noble gases are following: helium (He). neon (Ne). argon (Ar). krypton (Kr). xenon (Xe). radon (Rn). oganesson(Og). They are known as noble or inert because they have complete octets and do not react with other elements.

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2. Platinum and other group 10 metals often act as solid phase hydrogenation catalysts for unsaturated hydrocarbons such as propylene, CH3CHCH2. In order for the reaction to be catalyzed the propylene molecules must first adsorb onto the surface. In order to completely cover the surface of a piece of platinum that has an area of 1.50 cm² with propylene, a total of 3.45 x 10¹7 molecules are needed. Determine the mass of the propylene molecules that have been absorbed onto the platinum surface.

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Question

Chapter 4, Problem 57QAP

Interpretation Introduction

Interpretation:

To determine the noble gas which is relatively present in large concentration in the atmosphere.

Concept Introduction:

Periodic table is arrangement of different elements with the help of columns and rows in order to characterize elements with similar properties in same groups such as alkali metals, alkaline earth metals, halides, noble gases, transition elements etc. In the periodic table, columns represent groups and rows represents periods.

The elements of group 18, which are known as noble gases are following:

helium (He).

neon (Ne).

argon (Ar).

krypton (Kr).

xenon (Xe).

radon (Rn).

oganesson(Og).

They are known as noble or inert because they have complete octets and do not react with other elements.

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