Use the animation to show students a ball model of a water molecule (H 2 O) and post the water molecule card. Explain that a water molecule has two hydrogen atoms and one oxygen atom. Ask students to ...

In the water molecule, the oxygen and hydrogen atoms share electrons in covalent bonds. There are a total of 10 protons and 10 electrons, so the water molecule is neutral. The electron cloud model ...

Hydrogen is an element; it exists naturally as a molecule. Each hydrogen molecule is made up of two hydrogen atoms. In hydrogen cars hydrogen reacts with oxygen in a fuel cell, making electricity ...