Half-life is<span> the term for the amount of time it takes 50% of an element to decay</span>
They are positively and negatively charged
The Atlas. This is the topmost vertebra, and with the axis, it forms a joint that connects the skull to the spine. These two parts of the body (The Atlas and The Axis) are special, and different from normal vertebra, because they are made to allow a greater range of motion and movement in the head. I hope this helps! Also, google is always a helpful tool to use as well. :)
The answer to your question is <span>chemical energy
</span>
The brain of the cell most important