The atmosphere consists of a number of permanent gases, to identify each substance as an element or compound, and air is homogenies or heterogeneous it should be explained. Concept Introduction: Elements: The elements are chemically the simplest substance and hence cannot be broken down using chemical reaction elements can only be changed into other elements to using nuclear experiments. Substance: This is a form of matter that has constant chemical composition and characteristic properties it cannot be separated into components by physical separation methods. Pure substance: The substance that has a uniform (or) correct chemical composition throughout. Mixture: It is blend of two or more substance, each of which retains its chemical identically. Homogeneous mixture: It is blend of two or more pure substance having a uniform composition at the particular level. Heterogeneous mixture: It is blend of two or more pure substance having a non-uniform composition at the particular level.

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Chapter 1, Problem 1.53ASP

Interpretation Introduction

Interpretation:

The atmosphere consists of a number of permanent gases, to identify each substance as an element or compound, and air is homogenies or heterogeneous it should be explained.

Concept Introduction:

Elements: The elements are chemically the simplest substance and hence cannot be broken down using chemical reaction elements can only be changed into other elements to using nuclear experiments.

Substance: This is a form of matter that has constant chemical composition and characteristic properties it cannot be separated into components by physical separation methods.

Pure substance: The substance that has a uniform (or) correct chemical composition throughout. Mixture: It is blend of two or more substance, each of which retains its chemical identically.

Homogeneous mixture: It is blend of two or more pure substance having a uniform composition at the particular level.

Heterogeneous mixture: It is blend of two or more pure substance having a non-uniform composition at the particular level.

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