Why lighter cubes are used for igniting charcoal fire

~ Set the lighter cubes on the charcoal grate and light them. Then you'll need to set the Chimney Starter directly on top of the lighter cubes, on the charcoal grate. The fire from the cubes will begin burning the charcoal and the flames will grow upwards from there

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

pie chart because it is in percents ( % )