Question

identifying compounds, elements, mixtures through common names
elements are substances that cannot be broken into simpler substances by chemical means. compounds are composed of two or more elements that are chemically combined in definite proportions by mass. mixtures are combinations of two or more substances that can be separated by physical means.
directions: place a check in the correct box to indicate the classification of each form of matter

Explanation:

Step1: Recall definitions

Elements can't be broken chemically, compounds have elements combined chemically in fixed ratios, mixtures can be separated physically.

Step2: Analyze Soil

Soil is a mixture of various substances like minerals, organic matter etc., separated by physical means. So it's a mixture.

Step3: Analyze Water ($H_2O$)

Water is composed of hydrogen and oxygen chemically combined in a fixed ratio, so it's a compound.

Step4: Analyze Sodium

Sodium is an element as it can't be broken into simpler substances by chemical means.

Step5: Analyze Ice

Ice is just the solid - state of water ($H_2O$), a compound.

Step6: Analyze Glucose

Glucose ($C_6H_{12}O_6$) is composed of carbon, hydrogen and oxygen chemically combined, so it's a compound.

Step7: Analyze Antimony

Antimony is an element as it can't be broken into simpler substances by chemical means.

Step8: Analyze Carbon Dioxide

Carbon dioxide ($CO_2$) is composed of carbon and oxygen chemically combined, so it's a compound.

Step9: Analyze Al

Al (aluminum) is an element as it can't be broken into simpler substances by chemical means.

Step10: Analyze Oxygen

Oxygen is an element as it can't be broken into simpler substances by chemical means.

Step11: Analyze Table Salt

Table salt (sodium chloride, $NaCl$) is a compound as it is composed of sodium and chlorine chemically combined.

Step12: Analyze Salt and Pepper

Salt and pepper is a mixture as they can be separated by physical means like sifting.

Step13: Analyze Krypton

Krypton is an element as it can't be broken into simpler substances by chemical means.

Step14: Analyze Cola

Cola is a mixture of water, sugar, flavorings, carbon - dioxide etc., separated by physical means.

Step15: Analyze Gallium

Gallium is an element as it can't be broken into simpler substances by chemical means.

Step16: Analyze Yttrium

Yttrium is an element as it can't be broken into simpler substances by chemical means.

Step17: Analyze Oil and Water

Oil and water is a mixture as they can be separated by physical means (decantation).

Step18: Analyze Zirconium

Zirconium is an element as it can't be broken into simpler substances by chemical means.

Answer:

Substance	Element	Compound	Mixture
Water		√
Sodium	√
Ice		√
Glucose		√
Antimony	√
Carbon Dioxide		√
Al	√
Oxygen	√
Table Salt		√
Salt and Pepper			√
Krypton	√
Cola			√
Gallium	√
Yttrium	√
Oil and Water			√
Zirconium	√