For instance, oxygen molecules tend to pair up in the air.
But in nature, those elements rarely exist as single atoms. The periodic table lists all existent elements. It has a large, circular label with the text 'soda' to indicate that it is a bag of baking soda. The far right image is of a white paper bag. By the right image, an arrow points away from the mouth indicating that the person is exhaling. In the left image, an arrow points towards the mouth indicating that the person is inhaling. To the right of this, are two cross sections of a person from the chest up. To the right of this is an illustration of a salt shaker that is half full of salt. On the far left is an image of a water droplet about to hit the surface of water and a splash on the surface of water. Shown are four illustrations and chemical formulas for some common molecules. Open Professional Learning × Close Professional Learning Open Educational Resources × Close Educational Resources
