"Microscopic Particle Model of Matter" PPT courseware

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"Microscopic Particle Model of Matter" PPT courseware

Part 1: What molecules are made of

give it a try

Can you use an intuitive method to express the difference between the two changes in the picture on the right?

The vaporization of water is a physical change

The distance between water molecules becomes larger.

The water molecules themselves have not changed, they have not turned into new molecules.

Can you summarize the information obtained from the above model of the water splitting process?

1. Essence: molecules are split into atoms, and atoms are recombined into molecules.

2. Atom: It is the smallest particle in chemical changes.

3. Molecule: It is a kind of particle that maintains the chemical properties of matter.

Microscopic particle model of matter PPT, Part 2: Consolidation test questions

1. The following substances are directly composed of atoms ( )

A oxygen B water C carbon dioxide D rare gas

2. The main difference between molecules and atoms is: ( )

A molecules are larger than atoms

B molecules can maintain the chemical properties of substances but atoms cannot

C Molecules can be divided into atoms during chemical changes, but atoms cannot be divided again during chemical changes.

D Molecules are always moving, but atoms do not move

3. The particles that maintain the chemical properties of water are ( )

A.Water molecule B.Water atom C.Hydrogen molecule D.Oxygen atom

4. The particles that maintain the chemical properties of silicon are _________.

5. Prove that molecules can be divided in chemical changes ( )

A. Grind iron ore into powder

B. Iodine sublimates when heated

C. When water is heated, water vapor is generated

D. Heating of mercury oxide produces mercury and oxygen

Microscopic particle model of matter PPT, the third part: different molecules

Different types and numbers of atoms can form different molecules.

give it a try

Conclusion: Molecules can be made of different kinds of atoms or they can be made of the same kind of atoms.

Different types and numbers of atoms can form different molecules.

Microscopic particle model of matter PPT, part 4: size and mass of particles

1. The number of molecules in a drop of water: 1021 water molecules. 1ml of water requires about 20 drops of water.

2. If water molecules are enlarged to the size of a ping pong ball, then the ping pong ball will be enlarged to the size of the earth.

3. The black writing left by the pencil is the accumulation of carbon atoms. There are actually 1018 carbon atoms in a period.

Enlightenment: 1. Molecules and atoms are very small.

Coins have a certain mass and volume!

What particles are the five-cent copper coins made of?

What insights did you get from the experimental structure and analysis?

2. Although molecules and atoms are small, they still have a certain mass and volume.

3. Different types of molecules and atoms have different masses and volumes.

Keywords: Zhejiang Education Edition eighth grade science PPT courseware for the second volume free download, microscopic particle model of matter PPT download, .PPT format;

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"Microscopic Particle Model of Matter" PPT:

"Microscopic Particle Model of Matter" PPT Part One: Review of Molecules 1. A molecule is a kind of particle that constitutes matter; 2. The volume and mass of molecules are very small; 3. The same kind of molecules have the same properties, but different kinds of molecules have different properties; 4. Molecular kinetic theory: ① Points..

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Update Time: 2024-07-02

This template belongs to science courseware Zhejiang Education Edition Eighth Grade Science Volume 2 industry PPT template

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