Chemistry please check

posted by .

1. All of the naturally occurring radioactive decay series end when the radioactive elements have decayed to

bismuth (Bi)
hydrogen (H)
lead (Pb)
uranium (U)

answer: Uranium (U)

2. This type of radiation can easily pass through a human.


answer: gamma

3. This type of radiation is really the nucleus of a helium atom.


answer: alpha

4. As the size of nuclei increases, the ratio of neutrons to protons in the band of stability increases to

3 to 1
1.25 to 1
2 to 1
1.5 to 1

answer: 1.5 to 1

  • Chemistry please check -

    Ok except for #1. U is a radioactive element, naturally. There is a series for U-238, another series for U-235, and a third for Th-232. All end in Pb.

  • Chemistry please check -

    please need help thanks alot!!!!

  • Chemistry please check -

    Mike--If you have a question, go to the top of the page and click on Post a New Question. Then type in your question and submit it. Someone will review it for you.

  • Chemistry please check -

    Thanks DrBob222!

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. science

    Calculate the uranium ratios in the natural uranium decay chain using radioactive decay relationships. Compare to the value obtained using published natural abundances.
  2. Physical science

    Why can't naturally occuring uranium be used in a nuclear power plant?
  3. earth science

    How is the decaying of radioactive uranium into lead used to date rock?
  4. Physical Science

    3. Radioactive decay of nuclei often involves several decays before a stable nucleus is formed. This is called a decay chain. What stable isotope is formed when radon-222 undergoes a decay chain of four alpha decays followed by four …
  5. Science

    Look at the table of radioactive isotypes below. Isotype Type of Decay Uranium-238 Alpha Nickel-63 Beta Iodine-131 Beta Radium-226 Alpha With the help of a periodic table, predict the element that forms in each case. I'm confused by …
  6. Science

    When Marie Curie Isolated uranium from pitchable, she realized that the [itchable was more radioactive than the uranium she had extracted. What did she conclude about her observations?
  7. Science

    How does radioactivity make it possible to understand how Earth can be so old and still have a hot interior?
  8. Science

    When Marie Curie isolated uranium from pitchblende, she realized that the pitchblende was more radioactive than the uranium she had extracted. What did she conclude about her observations?
  9. Chemistry 101

    In addition to uranium, which elements were known to emit radioactive "rays" before M. Curie discovered radium?
  10. physics- help me please

    Suppose you have two cubic meters of uranium, four cubic meters of lead, four cubic meters of copper. Rank them by mass, from smallest to largest. a)lead, copper, uranium b)uranium, copper, lead c)copper, uranium, lead d)uranium, lead, …

More Similar Questions