"Classification of Elements and Matter" Elements and the Material World PPT Courseware (Lesson 1 Material Classification and Its Application)

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"Classification of Elements and Matter" Elements and the Material World PPT Courseware (Lesson 1 Material Classification and Its Application)

Part One: Introduction of New Course

Lenovo questions:

Facing the rich and colorful material world, have you ever thought about the inner connection between these materials? We can understand and study matter by classification. So, how to classify it can help us understand and study matter more effectively?

【Exchange·Discussion】

You have been exposed to many substances, such as sodium, magnesium, iron, magnesium oxide, sodium chloride, sodium hydroxide, carbon monoxide, carbon dioxide, chlorine, hydrogen, oxygen, ferrous chloride, ferric oxide, sodium carbonate, carbon element , sulfuric acid, carbonic acid, ferric chloride, etc.

1. What are the elements that make up these substances?

2. Can you classify these substances from the perspective of elemental composition?

3. The picture above lists some substances containing carbon element. What other substances contain carbon element? Among these substances, what is the valence of carbon? What is the relationship between these substances containing carbon?

How does the above discussion inspire you to understand the relationship between elements and matter?

Classification of elements and substances PPT, part 2: knowledge sorting

1. The relationship between elements and matter

1. (Macroscopic understanding) Matter is composed of elements.

2. Two forms of existence of elements

Free state - elements in simple matter

Combined state – elements in a compound

3. Classification of substances according to their elemental composition

4. The same element can exist in different types of substances.

5. Some elements may have different valencies in different compounds.

2. Material classification and material properties

【Activities·Exploration】

Study the properties of a class of substances

You have already studied metals, non-metals, oxides, acids, bases, salts and other types of substances. So, what are the properties of each type of substance? What is the reaction relationship between various substances? Please work together with your classmates to complete the following tasks.

1. Classify the following substances according to their categories.

Metallic iron, carbon element, carbon dioxide, calcium carbonate, sodium carbonate, oxygen, calcium oxide, calcium hydroxide, hydrochloric acid, sodium chloride, barium chloride, sulfuric acid, sodium sulfate, copper sulfate, copper hydroxide, sodium hydroxide, nitric acid silver.

compound

Acid sulfuric acid, hydrochloric acid

Alkali sodium hydroxide, calcium hydroxide

Salt Calcium carbonate, sodium carbonate, sodium chloride, barium chloride, sodium sulfate, copper sulfate, silver nitrate

Oxides carbon dioxide, calcium oxide, copper oxide

Simple substance

metal element metallic iron

Non-metallic elements Carbon element, oxygen

2. Predict what similar properties each type of substance has.

3. Select a type of substance, select corresponding reagents, design experiments, and prove your prediction.

Classification of elements and substances PPT, Part 3: Classroom exercises

Exercise: Decide whether the following statements are correct.

1. Metal oxides must be alkaline oxides. ( )

2. Alkaline oxides must be metal oxides. ( )

3. Acidic oxides must be non-metal oxides. ( )

4. Non-metal oxides are not necessarily acidic oxides. ( )

5. A compound that can ionize H+ must be an acid. ( )

6. CH3COOH is a monobasic acid. ( )

7. Compounds containing oxygen are all oxides. ( )

Classification of elements and substances PPT, part 4: In-person testing

1. The following words are printed on the label of a certain mineral water: Main ingredients (unit: mg/L) Ca: 20.2, K: 39.1, Mg: 3.27, Zn: 0.06, F: 0.02.

"Ca, K, Mg, Zn, F" on the label refers to ( )

A. Element B. Element C. Atom D. Molecule

2. Which of the following related substances is classified or classified incorrectly ( )

A. Mixture: hydrochloric acid, pig iron, air

B. Compounds: CaCl2, NaOH, HCl

C. Salt: CaO, calcium carbonate, salt

D. Elemental substances: He, O2, O3

3. A study group discussed and analyzed which of the following statements is correct ( )

A. Coarse salt and caustic soda are mixtures

B. Soda ash and caustic soda are both bases

C. Ice and dry ice are both pure substances and compounds.

D. Hydrochloric acid and vinegar are both compounds and acids.

4. Which of the following statements is correct ( )

A. Non-metal oxides are all acidic oxides

B. All compounds that can ionize to form H+ are acids.

C. Salt substances must contain metal elements

D. Metal oxides are not necessarily alkaline oxides

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Update Time: 2024-11-18

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