Our unique Chem Time Clock replaces the usual clock numbers with symbols of elements having corresponding atomic numbers. "H" replaces "1", "He" replaces "2", etc. The idea for this clock came from Prof. Bassam Shakhashiri
at the University of Wisconsin, who asked Ron Perkins to make one in the summer of 1983. It is the perfect addition to a science classroom.
(Requires 1 AA Battery - not included.) 13" diameter. Attractive green border.
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Sep 3, 2015 | By georgia smith of KS United States
May 7, 2015 | By Georgia Smith of Olathe, KS United States
This clock is a great addition to my room!
Dec 5, 2014 | By Carrol Wedgewood of Bandana, KY United States
Chem Time Clock
Sep 1, 2014 | By Diane Osborne of Seminole, FL United States
Aug 16, 2014 | By Spence Bergner of Grand Junction, CO United States
Every Chemistry Teacher Needs One
Jul 3, 2014 | By Sally MItchell of Syracuse, NY United States
Chem Time Clock
Dec 27, 2013 | By Jane Ramos of Smithfield, RI United States
Retired teacher/adjunct teacher for JCCC/facilitat
Dec 16, 2013 | By Georgia of Olathe, KS United States
Jan 14, 2013 | By Jessica of Waverly, IA United States
The Best & The Original Authentic Chemistry Clock!
Aug 27, 2012 | By Perplexed Guide of Corvallis, OR United States
Jul 24, 2012 | By Gloria Lopez of Las Vegas, NV United States
May 31, 2012 | By c herald of Manhattan, KS United States
May 30, 2012 | By Jamie Flint of Richmond, TX United States
May 29, 2012 | By Kathleen Murphy of Sun City, AZ United States
Fun Time Piece
May 29, 2012 | By RitaMartin of Texarkana, TX United States
Time Can Be 'Elemental'
May 29, 2012 | By Cecilia W. of Union, NJ United States
May 23, 2012 | By Bill of Chandler, AZ United States
May 22, 2012 | By Jedon of Toronto, ON Canada
Entertaining for students
May 21, 2012 | By Charlene of San Diego, CA United States
May 17, 2012 | By Ashley Dyson of Brandon, MB Canada
Keep them guessing
May 17, 2012 | By Kathryn Yocum of Natchitoches, LA United States
Great classroom addition!
May 16, 2012 | By Susan of Rockmart, GA United States
Great for Chemistry classroom!
May 16, 2012 | By Melissa Yard of Woodbury, CT United States
May 16, 2012 | By Jennifer Clancy of Dundee, NY United States
This product will support your students' understanding of the Next Generation Science Standards (NGSS)*, as shown in the table below.
Suggested Science Idea(s) 2-PS1-1
| Elementary || || Middle School || || High School |
| 2-PS1-1 |
Students can use the Chem Time Clock to learn the value of the elements as they plan and conduct an investigation to describe and classify different kinds of materials by their observable properties. 5-PS1-1
Students can use the Chem Time Clock to learn the value of the elements as they develop a model to describe that matter is made of particles too small to be seen.
| || MS-PS1-1 |
Students can use the Chem Time Clock to remember the value of the elements as they develop models to describe the atomic composition of simple molecules and extended structures. DCI-MS/PS1.A: Structure and Properties of Matter.
Substances are made from different types of atoms, which combine with one another in various ways. Atoms for molecules that range in size from two to thousands of atoms.
| || HS-PS1-1 |
Students can use the Chem Time Clock to reference the Periodic Table as a model to predict the relative properties of elements based on the patterns of electrons in the outermost energy level of atoms. DCI-HS/PS1.A: Structure and Properties of Matter.
The Periodic Table orders elements horizontally by the number of protons in the atom's nucleus and places those with similar chemical properties in columns. The repeating patterns of this table reflect patterns of outer electron states.
Students can use the Chem Time Clock in a fun way to reference the Periodic Table. The 24 numbers found on the face of a clock are replaced with symbols of elements having the corresponding atomic numbers. 'H' replaces '1', 'He' replaces '2', etc.
* NGSS is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards were involved in the production of, and do not endorse, this product.