What isotopes of hydrogen fuse best at “moderate” temperatures?

Q: How many neutrons does the following isotope of oxygen have? O 18 0 8 O 10 O 26 O 18

A: Given data: The isotope of oxygen O818 Required: Number of neutrons

Q: Where in the atom is most of its mass concentrated?

A: The atom comprises of three sub-atomic particles, proton electron and neutron. The protons and…

Q: Choose the BEST answer to the following. When an element ejects a beta particle, the atomic number…

A: Answer:bi,e increases by 1.

Q: certain radioactive isotope has a half-life of 4.0 hours. How much time does it take for the amount…

A: Half life = t = 4 h let the time taken in measure of no. of half lives taken to decrease be n…

Q: Choose the BEST answer to the following. Which process would release energy from gold, fission or…

A: Nuclear fission is the splitting of a heavy nuclei or parent nuclei of an atom into smaller nucleus…

Q: If the size of a nucleus (in the range of 10-15 to 10-14 m) is scaled up to the tip of a sharp pin,…

A: The actual size of the nucleus is, 10-15m.The apparent size of the nucleus is, 10-5mThen, the…

Q: Where were the atoms that make up a newborn infant “manufactured”?

A:

Q: Which radioactive isotopes are produced when Uranium 238 decays?

A: When uranium 238 decays, it decay by emitting alpha particle.

Q: Compared with the energy it takes to separate oxygen and hydrogen from water, how much energy is…

A: According to the principle of conservation of energy, the total energy is always conserved.

Q: A microwave oven may: Group of answer choices make food radioactive. emit x-ray. heat up body…

A:

Q: composite particles or matter?

A: The Elementary  and composite particles are held together by a very strong nuclear force called…

Q: A radioactive element has an original mass of 150 grams. How much would be left in the parent atom…

A:

Q: The most common oxygen isotope is °0, but the rarer isotopes O and 10 of this element also exist in…

A:

Q: Why is a sample of radioactive material always a little warmer than its surroundings?

A:

Q: How is collision between two billiards balls different from a collision between an alpha-particle…

A: There are three different kinds of collisions. Elastic Inelastic Completely inelastic.

Q: Which of the following is not an element: hydrogen, carbon, oxygen, water?

A: An element is a pure substance which means it consists of only one type of atoms. When the atoms of…

Q: What is meant by the half-life of a quantity?

A: Half-life refers to the amount of time it takes for half of a particular sample to react.…

Q: A radioactive source has a half-life of 80 s. How long will it take for 7/8 of the source to decay?

A: Given, the half life a radioactive source =80 s we have to calculate the time for 7/8 of the source…

Q: Which element's isotope is often used to treat cancer patients?

A: The correct option is cobalt Cobalt therapy or cobalt -60 therapy is the medical use of gamma rays…

Q: After 90 years, 20 % of a radioactive material decays. What is the half-life?

A: Given data:   Time period, T = 90 years    Decay constant = λ   20% of radioactive material decay…

Q: Choose the BEST answer to the following. A certain element emits 1 alpha particle, and its products…

A: An alpha decay of 2He4 changes both the atomic mass and atomic number of the resulting element…

Q: Strontium - 90 has a half-life of 25 years.How long will it take 10 grams of Strontium - 90 to decay…

A: Given Half-life (h) = 25years Initial amount ( N0) = 10 g Final amount ( N ) = 3g

Q: What is a radioactive isotope

A: Required : What are radioactive isotopes.

Q: What element results if you add a pair of protons gto the nucleus of mercury?

A: Number of protons n in an element of mercury is 80

Q: The isotope cesium-137, which has a half-life of 30 years, is a product of nuclear power plants.…

A:

Q: What do you think is the reason for an increasing atomic radius within one group?

A: As we move down a group the number of energy levels increase.

Q: How does the wave model of electrons orbiting the nucleus account for discrete energy values rather…

A: An electron is circling the nucleus in standing waves. Then the boundary of these wave orbits is a…

Q: In a radioactive substance at t = 0, the number of atom is 8 x 104 . its half-life period is 3 yr.…

A:

Q: Complete the table for the radioactive isotope. Isotope 14C, Half Life (In years) 5715, Initial…

A: Half life of carbon 14 is 5715 years

Q: Why is carbon better than lead as a moderator in nuclear reactors?

A: Carbon is an effective stimulator of fission reaction than lead. In case of carbon, it interact with…

Q: How is it possible for an element to decay “forward in the periodic table”—that is, to decay to an…

A: It is possible for an element to decay “forward in the periodic table”—that is, to decay to an…

Q: The fictitious element cincinnatium O has five stable isotopes. Their masses and natural abundances…

A:

Q: Part 3 Atomic Cakulatinns: Complete the chart belowe. 10. Hof p #of n # of e Element Atomic # Mass #…

A: Atomic # - No. of protons or electrons Mass # - No. of protons + No. of neutrons

Q: The half-life of polonium is 139 days, but your sample will not be useful to you after 94% of the…

A: Calculate the decay constant of polonium. λ=ln2t1/2=ln2139 day=4.986×10-3 day-1 Here, λ is the decay…

Q: An element with an atomic mass of 57 has an isotope with an atomic of mass 58. The source of this…

A: Isotope is a terminology given to an element that has variation in atomic mass than the same element…

Q: What forces hold the nucleus together? And how do those forces compare in magnitude to the…

A: The nucleus of an atom is held together by the strong nuclear force. This force is the strongest…

Q: The curve to the right shows the radioactive decay of a particular sample of a nucleus called…

A: From the graph, we can notice that No = 400 N = 100 after 10 hrs

Q: What is the radioactive decay process in helium?

A: Spontaneous breakdown of the atomic nucleus by releasing the energy and matter is called Radioactive…

Q: If a sample contains 20g of an isotope that has a half life of 1000 years. How much will be left…

A: Given data:  Initial amount of sample (N0) = 20 g Half life (T1/2) = 1000 years Required: Remaining…

Q: Just after an alpha particle leaves the nucleus, would you expect it to speed up? Defend your…

A: An alpha particle is emitted by a nucleus

Q: a Atom X and atom Y have the same mass number, but they have different atomic numbers. Are they…

A:

Q: Are most of the atoms around us younger or older than the Sun?

A: Step 1 Sun is a star at the center of our universe. It is a sphere of hot plasma. Right now it is on…

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.