Students explore the concept that chemical reactions involve the breaking of bonds between atoms in the reactants, and the rearrangement and rebonding of these atoms to make the products. Students ...

Can be used to recap on tritation or could lead into a classroom discussion on chemical changes and structures.

A change is called irreversible if it cannot be changed back again. Many chemical reactions are irreversible. In a chemical reaction, new materials are always formed. Sometimes these new materials ...

The first major overhaul of US chemical safety regulations in over a decade introduces sweeping changes to classification, ...

The lesson can also be used to lay a foundation for learning about changes in state and chemical changes which can be further developed in later grades. If water is cooled enough it can change to ice.

A new study explores how complex chemical mixtures change under shifting environmental conditions, shedding light on the prebiotic processes that may have led to life. By exposing organic molecules to ...

The White House announced a new executive order signed by President Trump on Tuesday to "protect[] children from chemical and surgical mutilation." ...

An effort is underway to convince Georgia’s Environmental Protection Division that changes to a chemical plant’s permit will ...