Table of contents

1. Intro to General Chemistry3h 48m
2. Atoms & Elements4h 16m
3. Chemical Reactions4h 10m
4. BONUS: Lab Techniques and Procedures1h 38m
5. BONUS: Mathematical Operations and Functions48m
6. Chemical Quantities & Aqueous Reactions3h 53m
7. Gases3h 49m
8. Thermochemistry2h 37m
9. Quantum Mechanics2h 58m
10. Periodic Properties of the Elements3h 9m
11. Bonding & Molecular Structure3h 29m
12. Molecular Shapes & Valence Bond Theory1h 57m
13. Liquids, Solids & Intermolecular Forces2h 23m
14. Solutions3h 1m
15. Chemical Kinetics2h 53m
16. Chemical Equilibrium2h 29m
17. Acid and Base Equilibrium5h 1m
18. Aqueous Equilibrium4h 47m
19. Chemical Thermodynamics1h 50m
20. Electrochemistry2h 42m
21. Nuclear Chemistry2h 36m
22. Organic Chemistry5h 7m
23. Chemistry of the Nonmetals2h 39m
24. Transition Metals and Coordination Compounds3h 16m

2. Atoms & Elements

Periodic Table: Group Names

General Chemistry

2. Atoms & Elements

Periodic Table: Group Names

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Multiple Choice

Which two groups of elements in the periodic table are considered the most reactive?

Alkali metals (Group 1) and halogens (Group 17)

Transition metals (Groups 3-12) and lanthanides

Metalloids and actinides

Noble gases (Group 18) and alkaline earth metals (Group 2)

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Verified step by step guidance

Understand that reactivity in the periodic table depends on how easily elements lose or gain electrons to achieve a stable electron configuration.

Recognize that Group 1 elements, known as alkali metals, have a single electron in their outermost shell, which they tend to lose easily, making them highly reactive.

Know that Group 17 elements, called halogens, have seven electrons in their outermost shell and tend to gain one electron to complete their octet, making them very reactive as well.

Compare these groups to others: transition metals (Groups 3-12) and lanthanides are less reactive due to their electron configurations and multiple oxidation states; metalloids and actinides have varied reactivities but are generally not the most reactive groups; noble gases (Group 18) are very stable and unreactive, and alkaline earth metals (Group 2) are reactive but less so than alkali metals.

Conclude that the two most reactive groups are alkali metals (Group 1) and halogens (Group 17) because of their strong tendencies to lose or gain electrons, respectively.