CHEM& 121 Introduction to Atoms and The Periodic Table
Introduction to Atoms and The Periodic Table
The Periodic Table is the absolute best friend for a chemist, it has so
many hints that there is almost nothing to memorize!
Remember for pure substances t
CHEM& 121 Math and Measurement
Dr. Rosa Grajczyk (Grey-check )
Office SCI 124
Please print a Full Syllabus and read it before class on Wednesday.
Matter and Measurement (Some foundation before we jump i
CHEM& 121 Introduction to Bonding, Ionic Compounds
Introduction to Bonding, Ionic Compounds
In almost all of our examples, we encounter atoms in the form of
compounds instead of individual atoms.
When two atoms are joined together in a compound, they are
I. Common Monoatomic Ions (single atom):
A. Representative Groups
1. Group IA metals (+1): Li+, Na+, K+
2. Group IIA metals (+2): Mg2+, Ca2+, Sr2+, Ba2+
3. Group IIIA metals (+3): Al3+, Ga3+, In3+, Tl3+
Note: The metal cations take the metal
Molecular Modeling and
Hands-On Labs, Inc.
Review the safety materials and wear goggles when
working with chemicals. Read the entire exercise
before you begin. Take time to organize the materials
you will need and