Fifth Grade Science Volume 1, Textbook Edition
Science Edition for Sixth Grade Science Volume 2
Third Grade Science Volume 2, Textbook Edition
Science Edition for Sixth Grade Science Volume 1
Third Grade Science Volume 1, Textbook Edition
Fourth Grade Science Volume 2, Textbook Edition
Fourth Grade Science Volume 1, Textbook Edition
Qingdao Edition Fourth Grade Science Volume 2
Hunan Education Edition Fourth Grade Science Volume 1
E-education edition fifth grade science volume 1
E-education edition fifth grade science volume 2
Qingdao Edition Fifth Grade Science Volume 2
Fourth-grade science volume 2 of the E-education edition
Fifth Grade Science Volume 2, Textbook Edition
Zhejiang Education Edition Seventh Grade Science Volume 2
E-education edition third grade science volume 2
!["Quantities Represented by Element Symbols" PPT](https://resources2020.oss-cn-beijing.aliyuncs.com/resources2020/ee5442a85520bd68da0823636b818a08.jpg)
Category | Format | Size |
---|---|---|
Zhejiang Education Edition Eighth Grade Science Volume 2 | pptx | 6 MB |
Description
"Quantities Represented by Element Symbols" PPT
Part 1: Talk about the meaning of the following symbols
C
1. Represents carbon element
2. Represents a carbon atom
3. Represents carbon substances
CO2
1. Represents carbon dioxide substance
2. Indicates that carbon dioxide is composed of oxygen and carbon elements
3. Represents a carbon dioxide molecule
4. Indicates that a carbon dioxide molecule is composed of one carbon atom and two oxygen atoms.
Quantities represented by element symbols PPT, part 2 content: relative atomic mass
International regulations: relative atomic mass is used to express the mass relationship of atoms.
1. Definition of relative atomic mass
Taking 1/12 of the mass of a carbon atom as a standard, the value obtained by comparing the mass of other atoms with it is the relative atomic mass of that atom.
Referred to as atomic weight.
Why should we convert the actual mass of an atom into a relative atomic mass?
The actual mass of an atom is extremely small, making it complicated and inconvenient to calculate.
2. Steps to calculate relative atomic mass
(1) Standard:
Divide the mass of a C-12 atom into 12 equal parts, that is, one part is 1.661×10-27 kg
(2) Compare the masses of other atoms with this standard, and the resulting ratio is the relative atomic mass.
Quantities represented by element symbols PPT, Part 3 content: Thoughts and discussions
1. Is relative atomic mass the actual mass of an atom?
Can it reflect the actual mass of an atom?
Not the actual mass of the atom. is a ratio.
Energy, the greater the relative atomic mass, the greater the actual mass of the atom.
2. What are the advantages of relative atomic mass compared with the actual mass of an atom?
Numerical values are relatively simple and easy to write, operate, and remember.
3. If we want to use the relative mass of an atom, do we need to calculate it?
unnecessary. The relative atomic mass of an element can be found out from the relative atomic mass table (Appendix 3).
Quantity represented by element symbol PPT, part 4 content: relative molecular mass
1. Definition
The sum of the relative atomic masses of the atoms in a molecule.
2. Calculation steps
(1) Write the correct chemical formula
(2) Find out the relative atomic mass of each element
(3) Find the sum of the relative atomic masses of each atom in the molecule
Example: Find the relative molecular masses of carbon dioxide and sulfuric acid
Known: C-12 O-16 H-1 S-32
Relative molecular mass of CO2 (carbon dioxide molecule)
Quantities represented by element symbols PPT, Part 5: Practice
1. The relative atomic mass is----( )
A. The mass of an atom
B. The value obtained by comparing the mass of an atom to 1/12 of the mass of a carbon atom
C. The value obtained by comparing 1/12 of the mass of a carbon atom with the mass of a certain atom
D. The numerical value obtained by comparing an atom to 1/12 of a carbon atom
2. It is known that the mass ratio of atoms of a certain element to carbon-12 atoms is 9, then the relative atomic mass of the element is ---- ( )
A. 108 B. 1.33
C. 108 grams D. 1.33 grams
3. Which of the following relative molecular mass calculations is correct -------- ( )
A. NO2: Relative molecular mass=14×16×2=448
B. 2NH3: Relative molecular mass = 2×14 + 1×3 = 31
C. O2: Relative molecular mass = 16×2 = 32 grams
D. 2Ca(OH)2: Relative molecular mass = 2[40+(16+1)×2] =148
Keywords: Zhejiang Education Edition eighth grade science PPT courseware for the second volume is free to download, quantities represented by element symbols PPT download, .PPT format;
For more information about the PPT courseware "Quantities Represented by Element Symbols", please click the Quantities Represented by Element Symbols ppt tag.
"Quantities Represented by Element Symbols" PPT courseware:
"Quantities Represented by Element Symbols" PPT Courseware Part One: Relative Atomic Mass International regulations: use relative atomic mass to express the mass relationship of atoms. Taking 1/12 of the mass of the carbon-12 atom as the standard, the value obtained by comparing the masses of other atoms to it,...
File Info
Update Time: 2024-09-08
This template belongs to science courseware Zhejiang Education Edition Eighth Grade Science Volume 2 industry PPT template
"Quantities Represented by Element Symbols" PPT Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Quantities Represented by Element Symbols" PPT is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Quantities Represented by Element Symbols" PPT, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Preview
![《元素符号表示的量》PPT
(1)](https://resources2020.oss-cn-beijing.aliyuncs.com/resources2020/ee5442a85520bd68da0823636b818a08.jpg)
![《元素符号表示的量》PPT
(2)](https://resources2020.oss-cn-beijing.aliyuncs.com/resources2020/9348ad2d0be14641d9f0f002492bc1a6.jpg)