NASA
MASS, MASS – Who Has the MASS? Analyzing Tiny Samples
What is it worth to you? A hands-on instructional activity asks groups to collect weights of different combinations of coins and calculate weighted averages. They use the analysis to understand the concept of an isotope to finish the...
Curated OER
WS 3.3 Atomic Weight and Ions
In this atomic weight and ions worksheet, students answer questions about isotopes of atoms and how it relates to atomic weight. They also write out oxidation or reduction reactions for given atoms undergoing loss or gain of electrons.
Curated OER
Atomic Structure
A basic presentation to introduce some of the terminology regarding atomic weight, atomic structure, and atomic number awaits your students. An example of the calculations finding average atomic mass for carbon is given, and a way of...
Curated OER
Atomic Weight
In this chemistry learning exercise, students read about atoms, their charges, and their parts; protons and neutrons. They examine how to determine atomic weight by looking at an example. They work online as they practice finding the...
Curated OER
Mendeleev's Periodic Table
In this periodic table instructional activity, students learn how Mendeleev organized elements by their atomic weight and grouped elements with the same properties. Students compare Mendeleev's periodic table with the modern periodic...
Curated OER
Atomic Weight
In this atomic weight worksheet, students follow directions to complete an experiment with nuts, a scale, and calculator to calculate atomic weight. Students then answer 6 questions.
Curated OER
Earth and Beyond
In this earth and beyond worksheet, students answer short answer questions about the atmosphere, the chemical compounds in Earth's atmosphere. Students visit different websites to conduct research of the discoveries of the scientist who...
Carnegie Mellon University
Chem Collective: Mineral Composition
In this randomized calculation activity, students calculate the empirical formula of a compound given its elemental analysis. Step-by-step support and feedback is provided for students who need additional help.
Khan Academy
Khan Academy: Isotopes and Mass Spectrometry
Tutorial explains isotopes, atomic weight and how isotopes can be detected using mass spectrometry. Examples are given.
Other
Lenntech: Multilingual Periodic Table
An interactive periodic table of elements. Click an element to view a detailed description. Click the flags at the top to choose your language: English, French, Spanish, Dutch, and German.
Other
Chemistry Resources: The Elements: Alkali Metals
This subtable lists and describes the six alkali metals of the periodic table of Elements. Related links are provided.
CK-12 Foundation
Ck 12: Chemistry: Mass Number
[Free Registration/Login may be required to access all resource tools.] Shows the calculation of mass number.
Annenberg Foundation
Annenberg Learner: Isotopes, a Weighty Matter: Isotope Quiz
You will be presented with three different isotopes of the same element. See if you can calculate the atom's average relative mass.
Chem Tutor
Chem Tutor: Atomic Structure: Atomic Weights and Atomic Numbers
This lesson explains many basic concepts of atomic structure. It starts with atomic mass and number and then works up to more sophisticated information on electron configuration and how each element fits into the Periodic Table.