"Molecules and Atoms" The Mystery of Material Composition PPT Courseware 9

Description

"Molecules and Atoms" The Mystery of Material Composition PPT Courseware 9

learning target

1. Know that molecules are made of atoms

2. Be able to explain physical changes and chemical changes from molecular and atomic perspectives;

3. Understand the concepts of molecules and atoms

Learning points

Understand that molecules are the smallest particles that maintain the chemical properties of matter; atoms are the smallest particles in chemical changes

Learning difficulties

Be able to explain physical changes and chemical changes from molecular and atomic perspectives

Self-study guidance

1. What is the essence of physical change?

When a substance undergoes physical changes, the molecules themselves do not change. Only the spacing between molecules has changed.

2. What is the essence of chemical changes?

When substances undergo chemical changes, molecules of one substance change into molecules of other substances.

3. What is a molecule?

Molecules are the smallest particles that maintain the chemical properties of matter.

4. What does a molecule consist of? What is an atom?

Molecules are made of atoms.

Atoms are the smallest particles involved in chemical changes.

5. What are the differences and connections between molecules and atoms?

Difference: Molecules can be subdivided in chemical reactions, but atoms cannot.

Connection: Molecules can be divided into atoms, and atoms can form molecules.

1. The composition of molecules

Molecules are made of atoms.

2. Explain from a molecular point of view (substances composed of molecules)

physical changes and chemical changes

Physical changes: The molecules themselves do not change, only the distance between them changes.

Chemical change: The molecules themselves change to form new molecules.

Multiple choice questions:

1.The smallest particle that maintains the chemical properties of oxygen is ( )

A. Oxygen molecules B. Oxygen atoms C. Oxygen particles D. Oxygen

2. In the change of electrolyzed water, the unchanged thing is ( )

A. Water molecules B. Water atoms

C. Two atoms of hydrogen and oxygen D. None of the above

3. Which of the following statements is correct ( )

A. The electrolysis of water produces hydrogen and oxygen, indicating that the water contains hydrogen molecules and oxygen molecules.

B. The molecular chemical properties of the same substance are the same, while the molecular chemical properties of different substances are different.

C. Matter is made up of molecules, and molecules are made up of atoms.

D. The same kind of atoms can form molecules, but different kinds of atoms cannot form molecules.

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For more information about the PPT courseware "The Mystery of the Composition of Matter, Molecules and Atoms", please click on the "The Mystery of the Composition of Matter ppt, Molecules and Atoms" ppt tag.

"Molecules and Atoms" The Mystery of Material Composition PPT Courseware 8:

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Update Time: 2024-07-29

This template belongs to Chemistry courseware People's Education Press Ninth Grade Chemistry Volume 1 industry PPT template

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