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Chapter I
Review of the main concepts of the Grade 7 chemistry course
1
Review of Grade 7: atoms, moles and classes of compounds
Lessons 1–2
Chapter II
The periodic law and the periodic system of elements. Atomic structure
2
First classification of elements and natural families
Lessons 3–4
3
The periodic law
Lessons 5
4
The periodic system: periods and groups
Lessons 6
5
Composition of the nucleus. Isotopes
Lessons 7–8
6
Electron shells and energy sublevels
Lessons 9–10
7
Atomic structure of small- and large-period elements
Lessons 11–12
8
Describing elements by their place in the periodic system
Lessons 13
Chapter III
Chemical bonds
9
Electronegativity. The covalent bond
Lessons 14–15
10
The ionic bond. Crystal lattices
Lessons 16–17
11
Oxidation state
Lessons 18
12
Redox reactions
Lessons 19–20
Chapter IV
Nonmetals
13
Nonmetals. The halogens
Lessons 21–22
14
Chlorine
Lessons 23
15
Hydrogen chloride
Lessons 24
16
Avogadro’s law. Molar volume
Lessons 25
17
The law of equivalents
Lessons 26
18
Hydrochloric acid. Fluorine, bromine, iodine
Lessons 27–28
19
Practical work 1: the halogens
Lessons 29
Chapter V
General characteristics of the elements of main group VI
20
The oxygen subgroup. Hydrogen sulfide
Lessons 30–31
21
Sulfur oxides. Sulfuric acid
Lessons 32–33
22
Reaction rate. Chemical equilibrium
Lessons 34–35
23
Sulfuric acid industry. Practical work 2
Lessons 36–37
Chapter VI
The nitrogen subgroup
24
Nitrogen. Ammonia and ammonium salts
Lessons 38–39
25
Nitrogen oxides. Nitric acid
Lessons 40–41
26
Practical work 3: ammonia
Lessons 42
27
Phosphorus and its oxygen compounds
Lessons 43–44
28
Practical work 4: the nitrogen subgroup
Lessons 45
29
Mineral fertilizers
Lessons 46–47
30
Biogenic elements
Lessons 48
31
Practical work 5: identifying mineral fertilizers
Lessons 49
Laboratory sessions
32
Laboratory sessions
Lessons 50
☰ Contents · Chemistry
Grade 8
›
Chemistry
›
Week 20
The oxygen subgroup. Hydrogen sulfide
Lessons 30–31 · 2 lessons · I.R. Asqarov, K. G‘opirov, N.X. To‘xtaboyev. Chemistry Grade 8, revised 4th edition. “Yangiyul Poligraph Service”, Tashkent, 2019
Lesson 30
Lesson 31
Quiz
8
Homework
5
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