The best and most correct answer among the choices provided by the question is the second choice. The observation that is most likely would be that <span>the half life period of radioactive bismuth is 181.5 seconds. </span>I hope my answer has come to your help. God bless and have a nice day ahead!
Nails form from molten iron is considered a Physical change. Why? The molten iron is just heated in order to form a different shape which is the nail but its chemical composition is still the same. The chemical composition of the nail is still the same with iron.
Answer:
1. While there is no cure for Alzheimer's, there are medications to help temporarily improve symptoms.
2. The most recent research is/was the research on the drug sargramostim, (AKA Leukine), It's thought that the drug may stimulate the immune system to protect the brain from harmful proteins.
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