I believe the best answer to that question wud be D. I cud b wrong
Answer:Radium
Explanation:
The nuclear reaction involving two alpha emissions of 234 U is shown in the diagram. This leads to the formation of a 226Ra nucleus.
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A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. However, many genes do not code for proteins. In humans, genes vary in size from a few hundred DNA bases to more than 2 million bases
Baking powder is a mixture of baking soda and a mild edible acid such as tartaric acid
1.0×10^−15/4.2×10^−7=<span>2.3809524e-23 Hoped I helped!</span>