Answer: protein bar,it gives alot of energy and wont upset your stomach!!
Soil is made from dead plants, animals, and rocks.
![\;_{\phantom{2}85}^{217}\; \text{At} \to \;_\text{\phantom{2}83}^{213}\; \text{Bi} + \;_2^{4} \; \text{He}](https://tex.z-dn.net/?f=%5C%3B_%7B%5Cphantom%7B2%7D85%7D%5E%7B217%7D%5C%3B%20%5Ctext%7BAt%7D%20%5Cto%20%5C%3B_%5Ctext%7B%5Cphantom%7B2%7D83%7D%5E%7B213%7D%5C%3B%20%5Ctext%7BBi%7D%20%2B%20%5C%3B_2%5E%7B4%7D%20%5C%3B%20%5Ctext%7BHe%7D)
<h3>Explanation</h3>
Astatine has atomic number 85. "217" is the mass number of this isotope of At.
The mass number of an atom decreases by 4 as it undergoes alpha decay. Its atomic number decreases by 2. It emits an <em>alpha particle</em>, which is a helium-4 nucleus, in this process. The alpha particle has mass number 4 and atomic number 2.
The <em>daughter</em> nucleus has mass number 217 - 4 = 213 and atomic number 85 - 2 = 83. The atomic number of 83 corresponds to bismuth. Therefore the daughter nucleus is an atom of bismuth-213.
By convention, write the mass number A on the top-left corner of an element. Write its atomic number Z on the bottom-left corner. Note that A is always greater than Z for an isotope.
The reactant is dissolved in water
A gas and a liquid are produced
Explanation:
The equation doesn't satisfy the Law of Conservation of Matter because There are more oxygen atoms after the reaction than there were before the reaction.
Therefore,
Option C is correct ✔