"Elements Composing Matter" PPT download

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"Elements Composing Matter" PPT download

Part One Content: Review Introduction

1. The world is made of matter. From a microscopic perspective, what is matter made of?

Composed of particles such as molecules, atoms, and ions

2. What is the definition of element?

Atoms of the same type with the same nuclear charge (or number of protons) are collectively called elements.

3. From a macro analysis, what is matter composed of?

element

Elements that make up matter PPT, part 2 content: thinking

How to describe the composition and composition of water?

Macro:

Water is composed of hydrogen and oxygen (two elements).

Or: Water contains hydrogen and oxygen.

It cannot be said that water is composed of two hydrogen elements and one oxygen element.

microscopic

Water is made up of (many, many) water molecules.

Each water molecule is made up of two hydrogen atoms and one oxygen atom.

It cannot be said that water is composed of two hydrogen elements and one oxygen element.

A water molecule is made up of two hydrogen elements and one oxygen element.

Elements that make up matter PPT, part 3 content: Types of elements

Metal

Noble gases

nonmetal

Do you know where the names of elements come from?

The names of the elements that are gaseous at room temperature are often represented by "gas", such as hydrogen, helium, nitrogen, fluorine, neon, chlorine, and argon.

Elements whose elements are liquid at room temperature are often represented by the radical "氵" or "水", such as bromine, mercury, etc.

The constituent elements of non-metallic elements that are solid at room temperature are often referred to as the radical "stone", such as carbon, sulfur, phosphorus, etc.

Metal elements commonly use the radical "钅", such as sodium, iron, etc.

Elements that make up matter PPT, Part 4 content: Classroom exercises

Discuss whether the following statements are correct?

①Carbon dioxide is composed of one carbon element and two oxygen elements.

② Carbon dioxide molecules are composed of two elements: carbon and oxygen.

③Carbon dioxide is composed of two carbon atoms and one oxygen atom.

④Carbon dioxide is composed of a large number of carbon dioxide molecules.

⑤Carbon dioxide is composed of two substances: carbon and oxygen.

⑥The smallest particles that maintain the chemical properties of carbon dioxide are carbon atoms and oxygen atoms.

Elements that make up matter PPT, Part 5: Practice

1. Among the following substances, those containing oxygen molecules are ( ), and those containing oxygen atoms in their molecules are ( ),

The elements containing oxygen are ( ). Those that belong to elements are ( ), those that belong to compounds are ( ),

The mixture is ( ).

A. Water B. Oxygen C. Air D. Carbon dioxide

E. Hydrogen F. Sodium chloride (salt) H. Copper

2. After analysis, it is found that a certain substance contains only one element, then the substance - ( )

A. It must be a simple substance B. It must be a pure substance

C. It cannot be a mixture D. It cannot be a compound.

Elements that make up matter PPT, Part 6 content: Distribution of elements

1. Distribution of elements in the earth's crust

think:

1. What elements are the earth’s crust mainly composed of?

2. Which one has the highest content?

3. Which one is next?

4. Which metal element has the highest content? Which one comes next?

The distribution of elements in the earth's crust is uneven. The earth's crust is mainly composed of oxygen, silicon, aluminum, iron, calcium, sodium, potassium, magnesium, hydrogen and other elements. The highest content is oxygen, followed by silicon. The most abundant metal element is aluminum, followed by iron.

Think: What are the main elements of the human body? How is the content distributed from high to low?

The human body is mainly composed of three elements: carbon, hydrogen, and oxygen. The content from high to low is oxygen, carbon, and hydrogen.

1. Distribution of elements in seawater

In addition to the two elements hydrogen and oxygen in seawater, the higher contents are chlorine and sodium (oxygen accounts for 85.8%, hydrogen 10.7%, chlorine 2.0%, sodium, magnesium, etc. 1.5%), as well as precious metals. Such as gold and so on.

2. Distribution of elements in organisms

Various living things contain a large number of organic compounds, such as blood sugar, plant fiber, etc. These organic compounds are mainly composed of three elements: carbon, hydrogen and oxygen.

3. Distribution of elements in the atmosphere

Mainly contains nitrogen, oxygen and other elements

Elements that make up matter PPT, Part 7: The role of elements

Man-made elements are produced through nuclear reactions, and some of them, both man-made and natural, are radioactive. Radioactive elements are harmful to the human body, but radioactivity can be used to treat some diseases, such as "radiotherapy" to treat cancer, and can also be used for sterilization and disinfection, such as irradiating food.

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For more information about the "Elements Composing Matter" PPT courseware, please click on the Elements Composing Matter PPT tab.

"Elements Composing Matter" PPT courseware:

"Elements Composing Matter" PPT Courseware Part One: Introduction to Elements What is the definition of an element? Atoms of the same type with the same nuclear charge (or number of protons) are collectively called elements. 1. The world is made of matter. From a microscopic perspective, what does matter consist of?

"Elements Composing Matter" PPT:

"Elements Composing Matter" PPT Part One Content: New lesson introduction to compare the molecular structures of carbon monoxide and carbon dioxide. Conclusion: (1) Both molecules contain carbon atoms and oxygen atoms; (2) The number of oxygen atoms contained in a molecule is different; (3) Both are composed of two elements: carbon and oxygen..

"Elements Composing Matter" PPT courseware on the composition of matter:

"Elements Composing Matter" The composition of matter PPT courseware Broadening horizons: elements and atomic numbers 1. In chemistry, atoms of the same type with the same nuclear charge (i.e., the number of protons) are collectively called elements. For example: all atoms with a nuclear charge of 1 are collectively called hydrogen elements; all...

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Update Time: 2024-07-28

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