Elements Compounds and Mixtures

Elements Compounds and Mixtures

What is the difference between a mixture and a Compound

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Look closely at the image

Notes

Elements CANNOT be broken down or decomposed into simpler substances by chemical means.

Diatomic Elements also cannot be broken down into simpler substances. What are Diatomic Elements?

The prefix Di-means 2
so Diatomic means 2 atoms.

There are 7 Diatomic elements that exists on the periodic table, H₂, N₂, F₂, O₂, I₂, Cl₂ and Br₂

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​DIATOMIC ELEMENTS

Check for understanding.

Multiple Choice

Oxygen is commonly found as 

• a solid-O

• a gas-O₂

• 
  unknown

Multiple Choice

In what form is Nitrogen commonly found in nature?

• 
  gas-N₂

• solid-N

• 
  unknown

Multiple Choice

N_2, Cl_{2, and} O₂ are all 

• 
  diatomic molecules.

• 
  ionic bonds.

• compounds

• None of the above

Multiple Choice

Diatomic molecules are __________ found in nature as their single element: I, O, N, H, Br, Cl, or H.

• Often

• sometimes

• never

• always

Notes

Compounds are composed of 2 or more elements chemically combined together in a fixed ratio.

They CAN be broken down by chemical means.

Notes

Mixtures are a combination of 2 or more pure substances that can be separated by physical means, such as magnetism, filtration and evaporation.

Both mixtures and compounds contain 2 or more different elements but they are very different

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Distinguishing between Mixtures and compounds

The amounts of each substance can change in a mixture. But the composition does not change in a compound.

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Distinguishing between Mixtures and compounds

Multiple Choice

The following picture shows a (an)

• Element

• Compound

• Mixture

Multiple Choice

The following picture shows a (an)

• Element

• Compound

• Mixture

Multiple Choice

The following picture shows a (an)

• Element

• Compound

• Mixture

Multiple Choice

The following picture shows a (an)

• Element

• Compound

• Mixture

Multiple Choice

The following picture shows a (an)

• Element

• Compound

• Mixture

Multiple Choice

The following picture shows a (an)

• Element

• Compound

• Mixture

Multiple Choice

The following picture shows a (an)

• Element

• Compound

• Mixture

Multiple Choice

Which letter or letters represents an element

• A only

• B only

• C ond D

• A and B

• check each particle before making a choice

• count the atoms in each molecule

• Note the patterns of each molecule

​When answering particle diagram questions

Log into google classroom and complete the Assignment " Distinguish between elements compounds and mixtures​"

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