Chemical reactions make new chemicals. Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change ...
Classification of Elements ... one type of compound is transformed into another type of compound, the chemical reaction is then called oxydation and reduction. // the polar- numher is increased ...
Iron oxide, aluminum, and a catalyst are placed in a flowerpot. The reaction is extremely exothermic resulting in molten iron and aluminum dripping into sand below the flowerpot. The demonstration ...
Objects and materials can be grouped in different ways depending on the properties used to group them. NGSS 2-PS1-1: Plan and conduct an investigation to describe and classify different kinds of ...
A new study from Cardiff and Bristol universities makes it possible to visualise chemical reactions involving small molecules, using software. Computer simulations ...
The Chem-E-Car competition races cars which are only powered by chemical reactions. The goal is to come up with an elegant solution – you can’t simply jettison matter out the back as the ...