Students explore the concept that chemical reactions involve the breaking of bonds between atoms in the reactants ... and cause a color change. Students also explore endothermic and exothermic ...

The speed of a chemical reaction is affected ... It can be calculated by measuring changes in reactants/products. Atomic structure Atoms are made from protons, neutrons and electrons.

Looking at some common but simple chemical reactions is a good way to encourage students ... provide opportunities to encourage students to consider these questions: What atoms are in the reactants?

When physical change occurs substances change their state ... Similarly between oxygen atoms. Then new chemical bonds are formed between oxygen and hydrogen atoms (reactants) to form water (product). ...

Now you know that atoms are really small and that there are huge numbers of them, but here are a few other atom facts you might find interesting. Where do atoms come from? Believe it or not, the atoms ...

Atoms are rearranged during a chemical reaction, but the number of atoms does not change. Evidence of chemical reactions includes a large temperature change, bubbles, or a colour change.

with the aim of analyzing the nature and strength of the chemical bonding in antimony. "The strength of a bond depends directly on the distance between the atoms," says Professor Claudia S.