"Elements Composing Matter" PPT

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"Elements Composing Matter" PPT

Part One: Introduction of New Course

Compare the molecular structures of carbon monoxide and carbon dioxide

Conclusion: (1) 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.

From a macro perspective, matter is composed of _______.

Analysis from a micro perspective

discuss

What are the differences and connections between elements and atoms?

Elements that make up matter PPT, part 2 content: Types of elements

There are more than 110 elements known to humans, some of which are man-made.

In fact, most of the world's matter is made up of just a few dozen common elements. Thousands of substances can be composed of just three elements: carbon, hydrogen, and oxygen.

Classification of elements:

Metal elements: copper, iron, silver, gold, etc.

Non-metallic elements hydrogen, oxygen, sulfur, etc.

(Including rare gas elements: such as helium, neon, argon, etc.)

(Note: Metal elements other than mercury are commonly used as the radical "copper")

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

1. The distribution of elements in the earth’s crust is uneven

Among them, the most abundant one is ______, followed by ______, then ______, iron

The most abundant metal element is ______, followed by ______.

The most abundant non-metal elements are ______, followed by ______.

2. The element with the highest content in the human body is ___, followed by ___, and then ___.

think

1. Why is the ocean a treasure trove of resources? What are the characteristics of distributed elements in the ocean?

The highest content in sea water is oxygen, followed by hydrogen, followed by chlorine and sodium, as well as precious metals such as gold, etc.

2. What elements are organic matter mainly composed of?

carbon, hydrogen, oxygen

3. Are radioactive elements harmful to the human body?

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

Elements that make up matter PPT, part 4 content: battlefield exercises

1. Among the following substances, those containing oxygen molecules are ( ),

The molecules containing oxygen atoms are ( ),

The elements containing oxygen are ( ).

What is a simple substance is ( ),

Belonging to the compound is ( ),

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.

3. The figure below is a schematic diagram representing gas molecules. In the figure, "___" and "___" respectively represent atoms with two different proton numbers.

(1) Representing a mixture is ______.

(2) Represents simple substance ______.

(3) The compound is represented by ______.

(4) What represents pure matter is ______.

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

"Elements Composing Matter" PPT download:

"Elements Composing Matter" PPT Download Part One: Review Introduction 1. The world is composed of matter. From a microscopic perspective, what is matter made of? It is composed of molecules, atoms, ions and other particles. 2. What is the definition of an element? Have the same nuclear charge..

"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 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: 2024-10-02

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