| Category | Format | Size |
|---|---|---|
| Cantonese Education Edition Ninth Grade Chemistry Volume 1 | pptx | 6 MB |
"Identifying the Elemental Composition of Matter" PPT courseware on the composition of air and matter 2
Description
"Identifying the Elemental Composition of Matter" PPT courseware on the composition of air and matter 2
Discussion What do the molecules of the above substances have in common?
The molecules of these substances all contain ____ atoms, which are atoms of the ____ element.
The particles of these substances all contain ____ atoms, which are atoms of the ____ element.
element
It is a general term for the same type of atoms (that is, a type of atoms with the same nuclear charge).
Such as: oxygen element——O
Hydrogen element——H
Carbon element - C, etc.
Writing and memorizing common element symbols
carbon hydrogen oxygen nitrogen sulfide iodine phosphorus
C H O N S I P
Potassium calcium sodium magnesium aluminum iron zinc
K Ca Na Mg Al Fe Zn
Helium Neon Argon Copper Mercury Silver
He Ne Ar Cu Hg Ag
Manganese, barium, fluorochlorosilicon, lead, gold
Mn Ba F Cl Si Pb Au
True or false
A mercury oxide molecule is composed of one mercury atom and one oxygen atom
Mercury oxide is composed of a mercury element and an oxygen element
Mercury oxide is composed of mercury and oxygen
Mercury oxide molecules are composed of a mercury element and an oxygen element
Mercury oxide molecules are composed of mercury elements and oxygen elements
Mercury oxide is composed of mercury and oxygen
Mercury oxide is composed of mercury atoms and oxygen atoms
Which of the following statements about carbon dioxide is correct?
A Carbon dioxide is composed of 2 oxygen elements and 1 carbon element
B carbon dioxide molecule is composed of oxygen and carbon elements
C carbon dioxide is composed of oxygen and carbon
D A carbon dioxide molecule is composed of two oxygen atoms and one carbon atom
E A carbon dioxide molecule is composed of two oxygen atoms and one carbon atom
1. It is reported that "there are currently about 2 billion people suffering from iron deficiency anemia in the world." The "iron" here refers to ( )
A steel B iron element
C Iron tetroxide D Iron oxide
2. The following symbols represent both an element, an atom, and a substance ( )
A, H B, O2 C, Mg D, 2N
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For more information about the PPT courseware "The Composition of Air Substances and Identifying the Elemental Composition of Substances", please click the "Composition of Air Substances ppt Identifying the Elemental Composition of Substances" ppt tag.
"Identifying the Elemental Composition of Matter" PPT courseware on the composition of air and matter:
"Identifying the Elemental Composition of Matter" The composition of air and matter PPT courseware 1. What is the general name of a type of atoms whose elements have the same nuclear charge (i.e., the number of protons). For the convenience of writing and academic communication, internationally unified symbols are used to represent them. various elements. two..
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Update Time: 2024-07-03
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