Answer:
Calculate the rate of decay constant for U-238 if its half-life is 4.468 × 109 years. Answer: If the problem is referring to the half-life, then the ratio of = 0.5 because half of the original sample has already undergone decay.
Explanation:
A (the first answer).
Explanation:
The mole is used because atoms are extremely small. If we found a way to count them by hand, the numbers would be in the millions. Great question!
<span>Zirconium cannot be broken down by a chemical change, because it is an element. The others are all molecules. Hope ive helped :)</span>
Chlorine 35 and chlorine 37 are two different types of chlorine atoms. They're called isotopes. The reason why one is 35 and 37 has to do with the subatomic particle called the neutron. Chlorine is atomic number 17 so both chlorine 35 and chlorine 37 has 17 protons and 17 electrons. But the chlorine 35 has 18 neutrons and the chlorine 37 has 20 neutrons, so the chlorine 37 is slightly heavier than the chlorine 35.
