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Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

This lecture covers the structure and trends of the modern periodic table, properties of metals, non-metals, metalloids, and key chemical compounds and gases. It also details the composition and uses of major alloys, common polymers, laboratory indicators, pH values, and fundamental contributions of eminent chemists.

Teaching
SSC
Other State PSC
Science
English · 4 topics
Checked against the video on 25 Oct 2026

Made by AI from the YouTube video Super TET Science 2026 | पदार्थ एवं पदार्थ की अवस्थाएँ | Matter | CLASS- 26 HANDWRITTEN NOTES Part-2 (opens YouTube in a new tab) by Balaji Study Adda, then checked against it. All credit for the teaching goes to the creator. Tap a topic’s time to confirm a fact in the video.

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

English4 topics · 5 MCQs · 12 flashcardsWatch the video (opens YouTube in a new tab)

Checked against the video

In short

Modern Periodic Table and Trends

0:30

Must knowHenry Moseley proposed the modern periodic law in 1913, stating that physical and chemical properties of elements are periodic functions of their atomic number.
The modern periodic table consists of 7 periods (horizontal rows) and 18 groups (vertical columns), containing a total of 118 elements.
The table is divided into four blocks: s-block (Groups 1-2), p-block (Groups 13-18), d-block (Groups 3-12), and f-block (Lanthanides 57-71, Actinides 89-103).
Must knowHydrogen is placed in the s-block, but its 1s1 configuration gives it unique properties distinct from other group members.
Metalloids or semi-metals in the periodic table include Boron (B, atomic number 5), Silicon (Si, 14), Germanium (Ge, 32), Arsenic (As, 33), Antimony (Sb, 51), Tellurium (Te, 52), and Polonium (Po, 84).
Group 1 elements are alkali metals, Group 2 elements are alkaline earth metals, Group 16 is the oxygen family, Group 17 consists of halogens, and Group 18 contains noble or inert gases.

Trend	Left to Right in a Period	Top to Bottom in a Group
Atomic Radius	Decreases	Increases
Ionization Energy	Increases	Decreases
Electronegativity	Increases	Decreases
Metallic Character	Decreases	Increases
Valency	Increases from 1 to 4, then decreases to 0	Remains constant

Chemical Compounds, Gases, and Laboratory Chemistry

12:15

Must knowSulphuric Acid (H2SO4) is a dense, oily, highly corrosive acid used in lead-acid batteries, fertilizer manufacturing, and detergent production.
Sodium Hydroxide (NaOH), known as caustic soda, dissolves in water exothermically and is used in soap, paper, and detergent industries.
Sodium Bicarbonate (NaHCO3) is baking soda, which produces carbon dioxide gas upon heating and serves as an antacid and fire extinguisher agent.
Hydrogen gas produces a distinct pop sound when brought near a burning matchstick.
Oxygen gas reignites a smouldering matchstick, while Carbon Dioxide gas turns lime water milky.
Must knowLitmus turns red in acid and blue in base, whereas phenolphthalein remains colourless in acid and turns pink in base.

Indicator	Colour in Acid	Colour in Base
Litmus	Red	Blue
Phenolphthalein	Colourless	Pink
Methyl Orange	Red	Yellow
Turmeric	Yellow	Red-Brown
China Rose	Pink	Green

Alloys, Polymers, and Useful Facts

15:57

Must knowBrass is an alloy of Copper (Cu) and Zinc (Zn), while Bronze consists of Copper (Cu) and Tin (Sn).
Stainless Steel contains Iron (Fe), Chromium (Cr), and Nickel (Ni), offering high strength and corrosion resistance.
German Silver contains Copper (Cu), Nickel (Ni), and Zinc (Zn); notably, it contains no actual silver.
Teflon (PTFE) is used for coating non-stick cookware due to its chemical resistance and non-stick properties.
Bakelite (phenol-formaldehyde) is a thermosetting plastic used to make electrical switches, plugs, and handles of cookware.
The liquid state element at room temperature among metals is Mercury (Hg), and among non-metals is Bromine (Br2).

Alloy	Composition	Key Properties / Uses
Brass	Cu + Zn	Yellow, malleable; used for utensils, locks
Bronze	Cu + Sn	Hard, corrosion-resistant; used for statues, medals
Solder	Sn + Pb	Low melting point; used for electrical soldering
Duralumin	Al + Cu + Mg + Mn	Lightweight, strong; used in aircraft and rail cars
Nichrome	Ni + Cr + Fe	High electrical resistance; used in heater coils

Key Scientists, Discoveries, and pH Scale

24:14

Must knowJohn Dalton formulated the atomic theory, stating that all matter is made of indivisible particles called atoms.
J.J. Thomson discovered the electron in 1897 using cathode ray experiment, while Ernest Rutherford discovered the atomic nucleus in 1911 using gold foil experiment.
James Chadwick discovered the neutron in 1932, and Niels Bohr proposed the quantized shell model of the atom in 1913.
Dmitri Mendeleev constructed the original periodic table based on atomic mass, whereas Henry Moseley revised it based on atomic numbers.
A pH value of 7 is neutral, less than 7 is acidic, and greater than 7 is alkaline; human blood has a normal pH range of 7.35 to 7.45.
The striking surface of a matchbox contains red phosphorus, while the matchstick head contains potassium chlorate.

Key terms

Periodic Law: The principle stating that chemical and physical properties of elements recur periodically when arranged by atomic structure.
Metalloid: An element whose properties are intermediate between those of metals and solid non-metals.
Alloy: A homogeneous mixture of two or more metals, or a metal and a non-metal.
Polymer: A large molecule composed of repeating structural units (monomers) connected by covalent bonds.
pH Scale: A numerical scale from 0 to 14 used to specify the acidity or basicity of an aqueous solution.

Formulas

H2SO4: Sulphuric Acid
NaHCO3: Sodium Bicarbonate (Baking Soda)
Ca(OH)2: Calcium Hydroxide (Slaked Lime)
CaO: Calcium Oxide (Quick Lime)
CaSO4 · 1/2 H2O: Plaster of Paris

Exam tips and traps

Do not confuse the components of a matchbox: red phosphorus is on the side box rubbing surface, whereas potassium chlorate is present on the matchstick tip itself.

Quick revision

Read these the night before the exam.

Henry Moseley formulated the modern periodic law based on atomic numbers in 1913.
The modern periodic table contains 7 periods and 18 groups with 118 total elements.
Atomic radius decreases across a period from left to right and increases down a group.
Brass is made of Copper and Zinc, whereas Bronze is composed of Copper and Tin.
German Silver consists of Copper, Nickel, and Zinc, containing zero percent silver.
Teflon is a non-stick polymer used on cookware, while Bakelite is used for heat-resistant electrical switches.
Litmus turns red in acidic solutions and blue in basic solutions.
Phenolphthalein is colourless in acidic medium and turns pink in alkaline medium.
Mercury is the only metallic element that remains liquid at room temperature.
Bromine is the only non-metallic element existing as a liquid at room temperature.
James Chadwick discovered the neutron in 1932.
The matchbox rubbing surface contains red phosphorus, and the matchstick head contains potassium chlorate.

These notes are made by AI from the video. Use the timestamps to check any important fact against the video before you rely on it.

Have a lecture of your own? Paste the YouTube link and get notes, a quiz and flashcards.

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Browse every checked set of notes, filed by exam and subject.

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Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Teaching
SSC
Other State PSC
Science
English · 4 topics
Checked against the video on 25 Oct 2026

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

English4 topics · 5 MCQs · 12 flashcardsWatch the video (opens YouTube in a new tab)

Checked against the video

In short

Modern Periodic Table and Trends

0:30

Must knowHenry Moseley proposed the modern periodic law in 1913, stating that physical and chemical properties of elements are periodic functions of their atomic number.
The modern periodic table consists of 7 periods (horizontal rows) and 18 groups (vertical columns), containing a total of 118 elements.
The table is divided into four blocks: s-block (Groups 1-2), p-block (Groups 13-18), d-block (Groups 3-12), and f-block (Lanthanides 57-71, Actinides 89-103).
Must knowHydrogen is placed in the s-block, but its 1s1 configuration gives it unique properties distinct from other group members.
Metalloids or semi-metals in the periodic table include Boron (B, atomic number 5), Silicon (Si, 14), Germanium (Ge, 32), Arsenic (As, 33), Antimony (Sb, 51), Tellurium (Te, 52), and Polonium (Po, 84).
Group 1 elements are alkali metals, Group 2 elements are alkaline earth metals, Group 16 is the oxygen family, Group 17 consists of halogens, and Group 18 contains noble or inert gases.

Trend	Left to Right in a Period	Top to Bottom in a Group
Atomic Radius	Decreases	Increases
Ionization Energy	Increases	Decreases
Electronegativity	Increases	Decreases
Metallic Character	Decreases	Increases
Valency	Increases from 1 to 4, then decreases to 0	Remains constant

Chemical Compounds, Gases, and Laboratory Chemistry

12:15

Must knowSulphuric Acid (H2SO4) is a dense, oily, highly corrosive acid used in lead-acid batteries, fertilizer manufacturing, and detergent production.
Sodium Hydroxide (NaOH), known as caustic soda, dissolves in water exothermically and is used in soap, paper, and detergent industries.
Sodium Bicarbonate (NaHCO3) is baking soda, which produces carbon dioxide gas upon heating and serves as an antacid and fire extinguisher agent.
Hydrogen gas produces a distinct pop sound when brought near a burning matchstick.
Oxygen gas reignites a smouldering matchstick, while Carbon Dioxide gas turns lime water milky.
Must knowLitmus turns red in acid and blue in base, whereas phenolphthalein remains colourless in acid and turns pink in base.

Indicator	Colour in Acid	Colour in Base
Litmus	Red	Blue
Phenolphthalein	Colourless	Pink
Methyl Orange	Red	Yellow
Turmeric	Yellow	Red-Brown
China Rose	Pink	Green

Alloys, Polymers, and Useful Facts

15:57

Must knowBrass is an alloy of Copper (Cu) and Zinc (Zn), while Bronze consists of Copper (Cu) and Tin (Sn).
Stainless Steel contains Iron (Fe), Chromium (Cr), and Nickel (Ni), offering high strength and corrosion resistance.
German Silver contains Copper (Cu), Nickel (Ni), and Zinc (Zn); notably, it contains no actual silver.
Teflon (PTFE) is used for coating non-stick cookware due to its chemical resistance and non-stick properties.
Bakelite (phenol-formaldehyde) is a thermosetting plastic used to make electrical switches, plugs, and handles of cookware.
The liquid state element at room temperature among metals is Mercury (Hg), and among non-metals is Bromine (Br2).

Alloy	Composition	Key Properties / Uses
Brass	Cu + Zn	Yellow, malleable; used for utensils, locks
Bronze	Cu + Sn	Hard, corrosion-resistant; used for statues, medals
Solder	Sn + Pb	Low melting point; used for electrical soldering
Duralumin	Al + Cu + Mg + Mn	Lightweight, strong; used in aircraft and rail cars
Nichrome	Ni + Cr + Fe	High electrical resistance; used in heater coils

Key Scientists, Discoveries, and pH Scale

24:14

Must knowJohn Dalton formulated the atomic theory, stating that all matter is made of indivisible particles called atoms.
J.J. Thomson discovered the electron in 1897 using cathode ray experiment, while Ernest Rutherford discovered the atomic nucleus in 1911 using gold foil experiment.
James Chadwick discovered the neutron in 1932, and Niels Bohr proposed the quantized shell model of the atom in 1913.
Dmitri Mendeleev constructed the original periodic table based on atomic mass, whereas Henry Moseley revised it based on atomic numbers.
A pH value of 7 is neutral, less than 7 is acidic, and greater than 7 is alkaline; human blood has a normal pH range of 7.35 to 7.45.
The striking surface of a matchbox contains red phosphorus, while the matchstick head contains potassium chlorate.

Key terms

Periodic Law: The principle stating that chemical and physical properties of elements recur periodically when arranged by atomic structure.
Metalloid: An element whose properties are intermediate between those of metals and solid non-metals.
Alloy: A homogeneous mixture of two or more metals, or a metal and a non-metal.
Polymer: A large molecule composed of repeating structural units (monomers) connected by covalent bonds.
pH Scale: A numerical scale from 0 to 14 used to specify the acidity or basicity of an aqueous solution.

Formulas

H2SO4: Sulphuric Acid
NaHCO3: Sodium Bicarbonate (Baking Soda)
Ca(OH)2: Calcium Hydroxide (Slaked Lime)
CaO: Calcium Oxide (Quick Lime)
CaSO4 · 1/2 H2O: Plaster of Paris

Exam tips and traps

Do not confuse the components of a matchbox: red phosphorus is on the side box rubbing surface, whereas potassium chlorate is present on the matchstick tip itself.

Quick revision

Read these the night before the exam.

Henry Moseley formulated the modern periodic law based on atomic numbers in 1913.
The modern periodic table contains 7 periods and 18 groups with 118 total elements.
Atomic radius decreases across a period from left to right and increases down a group.
Brass is made of Copper and Zinc, whereas Bronze is composed of Copper and Tin.
German Silver consists of Copper, Nickel, and Zinc, containing zero percent silver.
Teflon is a non-stick polymer used on cookware, while Bakelite is used for heat-resistant electrical switches.
Litmus turns red in acidic solutions and blue in basic solutions.
Phenolphthalein is colourless in acidic medium and turns pink in alkaline medium.
Mercury is the only metallic element that remains liquid at room temperature.
Bromine is the only non-metallic element existing as a liquid at room temperature.
James Chadwick discovered the neutron in 1932.
The matchbox rubbing surface contains red phosphorus, and the matchstick head contains potassium chlorate.

These notes are made by AI from the video. Use the timestamps to check any important fact against the video before you rely on it.

Open the Teaching folder →

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दैनिक जीवन में विज्ञान (Super TET सम्पूर्ण अल्टीमेट मास्टर नोट्स)
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Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Modern Periodic Table and Trends

Chemical Compounds, Gases, and Laboratory Chemistry

Alloys, Polymers, and Useful Facts

Key Scientists, Discoveries, and pH Scale

Key terms

Formulas

Exam tips and traps

Quick revision

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Modern Periodic Table and Trends

Chemical Compounds, Gases, and Laboratory Chemistry

Alloys, Polymers, and Useful Facts

Key Scientists, Discoveries, and pH Scale

Key terms

Formulas

Exam tips and traps

Quick revision

दैनिक जीवन में विज्ञान (Super TET सम्पूर्ण अल्टीमेट मास्टर नोट्स)

दैनिक जीवन में विज्ञान - सुपर टीईटी महत्वपूर्ण प्रश्नोत्तर

UP Super TET General Science: Daily Life Science Practice Questions

Science in Everyday Life - Super TET Revision Notes

Units and Measurement Practice Questions for Super TET

Living World and Cell Biology Practice Questions

दैनिक जीवन में विज्ञान (Super TET सम्पूर्ण अल्टीमेट मास्टर नोट्स)

दैनिक जीवन में विज्ञान - सुपर टीईटी महत्वपूर्ण प्रश्नोत्तर

UP Super TET General Science: Daily Life Science Practice Questions

Science in Everyday Life - Super TET Revision Notes

Units and Measurement Practice Questions for Super TET

Living World and Cell Biology Practice Questions

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Modern Periodic Table and Trends

Chemical Compounds, Gases, and Laboratory Chemistry

Alloys, Polymers, and Useful Facts

Key Scientists, Discoveries, and pH Scale

Key terms

Formulas

Exam tips and traps

Quick revision

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Periodic Table, Chemical Compounds, Polymers, and Chemistry Revision Notes

Modern Periodic Table and Trends

Chemical Compounds, Gases, and Laboratory Chemistry

Alloys, Polymers, and Useful Facts

Key Scientists, Discoveries, and pH Scale

Key terms

Formulas

Exam tips and traps

Quick revision

More Teaching Science notes

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