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Radioactive Elements
In elements with more than 83 protons, all of the isotopes are radioactive. ... The force of repulsion among all those protons makes the nuclei unstable. Elements with more than 92 protons have such unstable nuclei that they don't even exist in nature.
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Answer:
commensalism
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one animal benefits while the other is not harmed or affected in any way
Answer:
. Humans re-shape their environment, putting pressure on other species.
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Answer:
D the others are highly pollutant expesially nuclear and natural gas
Explanation:
The human skin is the protective layer of the human body against the external forces like the temperature, sharp objects, microbes, fungi and other related materials that can penetrate and weaken the body however, the integumentary system prevents any harm come to the organism. The dermis is the skin area which has different structures that perform different functions.
