A decomposition reaction occurs when ionic or covalent bonds are broken and elements and or ions or simpler molecules are formed.
C. Are vascular is the answer
The correct answer should be
<span>D. Autonomic nervous system
It is called autonomic because it works on its own and it regulates organs functioning which is a thing that happens involuntarily. It regulates heart beats for example and it's not something that you do voluntarily since the heart beats regardless of you. It also controls things like vomiting or sneezing that you can't choose not to do when it starts happening.</span>
Answer: 100 grams of the parent isotope will remain after one half life.
Explanation:
Mass of the isotope present at initial stage =
The mass of the parent isotope left after the time ,t=N
Time taken by the samle ,t =
The half life of the sample :
100 grams of the parent isotope will remain after one half life.