How do you get a theorem named after you? Euler knows what it takes! The third lesson of five asks pupils to use an interactive activity to compare the faces, vertices, and edges of seven different three-dimensional solids. They use...

This essay, written for Teachers' Domain, describes the foresight and pattern recognition that Russian chemist Dmitri Mendeleyev used to develop the modern periodic table of elements.

Read common questions and answers about atoms, elements and molecules.

Click to read different historical documents in chemistry related to the history of the study and discovery of radioactivity.

Research the element manganese on this site by finding its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of manganese.

Find information about element plutonium such as its properties and characteristics. Also study its chemistry including atomic weight, atom, uses, sources, name, and discovery.

Study the element boron and its chemistry including atomic weight, atom, uses, sources, name, and discovery on this site. Plus properties and characteristics of this element.

Explore the element beryllium on this site. Learn about its chemistry including atomic weight, atom, uses, sources, name, and discovery as well as its properties and characteristics.

On this site, kids learn about the element tin and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Also find the properties and characteristics of tin.

Kids learn about the element sodium and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of sodium are discussed.

Explore the properties and characteristics of sulfur on this site. Kids can learn about the element sulfur and its chemistry including atomic weight, atom, uses, sources, name, and discovery.

Investigate the properties and characteristics of silicon. Students can study the element silicon and its chemistry including atomic weight, atom, uses, sources, name, and discovery.

Study the properties and characteristics of potassium on this site. Learn about the element potassium and its chemistry including atomic weight, atom, uses, sources, name, and discovery.

Explore information about the element platinum and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Also learn about the properties and characteristics of platinum on this site.

Kids learn about the element nitrogen and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of nitrogen.

Kids learn about the element oxygen and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of oxygen.

Kids learn about the element nickel and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of nickel.

Kids learn about the element magnesium and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of magnesium.

Kids learn about the element argon and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics.

Kids learn about the element carbon and its chemistry including atomic weight, atom, uses, sources, name, and discovery on this site. Also, study the properties and characteristics of carbon.

Kids learn about the element chromium and its chemistry including atomic weight, atom, uses, sources, name, and discovery on this site. Also discussed is the properties and characteristics of chromium.

Kids learn about the element aluminum and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics.

Kids learn about the element calcium and its chemistry including atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of calcium.

This site includes information about phosphorus's atomic weight, atom, uses, sources, name, and discovery. Plus properties and characteristics of phosphorus are discussed.