Elements and their combinations account for all the varied types of matter in the world. As a basis for understanding this concept:
Lessons for this standard
Resources cannot be aligned to this standard, browse sub-standards to find lessons.
More specific sub-standards
Students know that during chemical reactions the atoms in the reactants rearrange to form products with different properties.
Students know all matter is made of atoms, which may combine to form molecules.
Students know metals have properties in common, such as high electrical and thermal conductivity. Some metals, such as aluminum (Al), iron (Fe), nickel (Ni), copper (Cu), silver (Ag), and gold (Au), are pure elements; others, such as steel and brass, are composed of a combination of elemental metals.
Students know that each element is made of one kind of atom and that the elements are organized in the periodic table by their chemical properties.
Students know scientists have developed instruments that can create discrete images of atoms and molecules that show that the atoms and molecules often occur in well-ordered arrays.