GENERAL CHEMISTRY (CHEM 101)
CHAPTER 1&2 LECTURE NOTES
92025-2026) GUIDE 100% VERIFIED
VIRGINIA COMMONWEALTH UNIVERSITY
,The Periodic Table of
Elements
Summary
Ch 1 & 2
, Elements and the Periodic
Table
Periods: 7 horizontal rows.
Groups: 18 vertical columns.
• International standard: 1-18
• US system: 1A-8A, 1B-8B
Main Groups
• columns 1A-2A (2 groups)
• columns 3A-8A (6 groups)
Transition Metals: 3B-2B (8 groups, 10 columns).
Inner Transition Metals: 14 groups between 3B and 4B.
• lanthanides
• actinides Summary
Ch 1 & 2
, Elements and the Periodic
Table
Metals: Left side of the zigzag line in the periodic table
(except for hydrogen).
Nonmetals: Right side of the zigzag line in the periodic
table.
Semimetals (metalloids): Tend to lie along the zigzag
line in the periodic table.
Summary
Ch 1 & 2
CHAPTER 1&2 LECTURE NOTES
92025-2026) GUIDE 100% VERIFIED
VIRGINIA COMMONWEALTH UNIVERSITY
,The Periodic Table of
Elements
Summary
Ch 1 & 2
, Elements and the Periodic
Table
Periods: 7 horizontal rows.
Groups: 18 vertical columns.
• International standard: 1-18
• US system: 1A-8A, 1B-8B
Main Groups
• columns 1A-2A (2 groups)
• columns 3A-8A (6 groups)
Transition Metals: 3B-2B (8 groups, 10 columns).
Inner Transition Metals: 14 groups between 3B and 4B.
• lanthanides
• actinides Summary
Ch 1 & 2
, Elements and the Periodic
Table
Metals: Left side of the zigzag line in the periodic table
(except for hydrogen).
Nonmetals: Right side of the zigzag line in the periodic
table.
Semimetals (metalloids): Tend to lie along the zigzag
line in the periodic table.
Summary
Ch 1 & 2
