Answer:
A chemical element is a type of atom with the same number of protons in their <u>atomic</u> nuclei.
Explanation:
For an example, the atomic number of Chlorine is 17, and there is 17 protons in Chlorine.
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B - To live in less extreme environments than most Archaebacteria.<span>♥</span>
Water, dirt, pebbles/gravel, clouds, temperature, sunlight. Hope this helps!