The elements listed in the choices are radioactive materials. These materials are very unstable because of the high neutron-to-proton ratio in the nucleus. Because of this, they spontaneously undergo nuclear reactions by giving off sub-particles in order to lower the ratio. They emit radiation in the form of alpha, beta or gamma.
Half-life is the length of time it needs to completely react half of the original amount. For example, it would take Bismuth 60.5 seconds to use up half of its amount. Therefore, the lower the half-life the faster the reaction is and the lesser the residual amount will be. With that being said, the answer would be Bismuth because it only takes seconds.
Can you please explain what the objective is?
Answer:
i can
Explanation:
There is much we can learn from the life of the apostle Paul. Far from ordinary, Paul was given the opportunity to do extraordinary things for the kingdom of God. The story of Paul is a story of redemption in Jesus Christ and a testimony that no one is beyond the saving grace of the Lord. However, to gain the full measure of the man, we must examine his dark side and what he symbolized before becoming “the Apostle of Grace.” Paul’s early life was marked by religious zeal, brutal violence, and the relentless persecution of the early church. Fortunately, the later years of Paul’s life show a marked difference as he lived his life for Christ and for the advancement of His kingdom.
The statement "Mass extinctions have occurred several times on Earth" explains the indication of the fossil record.
<h3>Indication of Fossil fuels:</h3>
Paleontologists are fascinated by the evolution and extinction of fossil species throughout geologic history. To do so, they look at all the fossils that have been preserved in sedimentary rocks.
The fossil record is what we call it. Paleontologists have been collecting fossils from sedimentary rock layers all over the world for over two centuries.
Their goal is to figure out how species have evolved over geologic time. It can be used as a geologic timescale once the succession is established.
Then, if a specific fossil is discovered in a rock, you can determine where it belongs on the geologic timescale.
Therefore, the correct option is the third sentence.
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