Answer:
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.
Explanation:
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Answer: Soil is the earthworm's habitat.
Explanation: The worm gets the food from the soil and also lives in to soil, that is the basic living needs for a habitat.
Answer:
Cell membrane and vesicle
