Nuclear Chemistry: Part 1 Unit Test Review And Test 100%

An article about half-lives describes a daughter isotope. What is a daughter isotope?

Examine the nuclear reaction: 1/1H + 1/0n -> 2/1H. Why is this classified as a nuclear reaction rather than a chemical reaction?

Consider the nuclear equation below. 239/94Pu -> X + 4/2He What is X?

A sample contains 16.75 g of the radioisotope U-236 and 50.25 g of its daughter isotope, Th-232. How long did it take for decay to take place if one half-life of U-236 is 23 million years?

Which represents a balanced nuclear equation?

An isotope undergoes radioactive decay by emitting radiation that has no mass. What other characteristic does the radiation have?

A radioactive nuclide has 53 protons and 78 neutrons. Which is the symbol of this nuclide?

What part of an atom is involved in a chemical reaction?

A target is shielded from a radioactive sample by a sheet of metal. What kind of radiation can pass through the sheet of metal and hit the target?

The symbol for a radioactive nuclide is 210/84Po. Which statement is correct?

Uranium-232 has a half-life of 68.8 years. After 344.0 years, how much uranium-232 will remain from a 100.0-g sample?

Which radioisotope is used as a tracer in nuclear scanning?

Sodium-24 has a half-life of 15 hours. After 45 hours, how much sodium-24 will remain of an original 50.0-g sample?

Samarium-146 has a half-life of 103.5 million years. After 1.035 billion years, how much samarium-146 will remain from a 205-g sample?

Read the passage below about different types of radiation. Different types of radiation have different penetrating abilities. For example, gamma rays can pass through cloth and paper, but alpha particles are blocked by cloth and paper. Beta particles are blocked by aluminum foil, but gamma rays are not. However, all three types of radiation are blocked by thick concrete or lead. Now, examine a table of penetrating powers of different types of radiation. Based on the information, at which numbered spot in the table does each type of radiation belong?

Which can have either a positive charge or a negative charge when they are released during radioactive decay?

Consider the nuclear equation below. 15/8O -> 1/7N + 0/+1e Which correctly identifies the type of reaction?

The original amount of a radioactive sample should be multiplied by which expression to calculate the amount of the sample that remains after n half-lives have passed?

Consider the image of a fossil below. mc007-1.jpg How is half-life most likely used with respect to this fossil?

What is the most penetrating kind of radiation product that can be shielded with aluminum foil?

How can a scientist assess whether a pure niobium (Nb) sample is responsible for contaminating the lab with radioactivity?

A sample contains 10.5 g of the radioisotope Pb-212 and 157.5 g of its daughter isotope, Bi-212. How many half-lives have passed since the sample originally formed?

A radioactive nuclide is used to detect eye tumors. An atom of this radionuclide contains 15 protons, 15 electrons, and 17 neutrons. Which is symbol of this radionuclide?

A certain radionuclide is used to diagnose lymphoma. An atom of this radionuclide contains 31 protons and 36 neutrons. Which statement is correct about the radionuclide?

Leutium-176 has a half-life of 3.85 mc012-1.jpg 1010 years. After 1.155 mc012-2.jpg 1011 years, how much leutium-176 will remain from an original 16.8-g sample?

A large atom decays and emits a particle. After the reaction is complete, the atom's mass has changed substantially. What kind of particle has most likely been emitted?

A radioactive nuclide that is used for radiation therapy for cancer has 33 neutrons and a mass number of 60. Which is the correct symbol for this nuclide?

If an unshielded sample of radioactive material emits alpha particles, what effect will it have on a person sitting in the next room? (Assume the wall between rooms is composed of concrete.)

Which particles that make up an atom are involved in nuclear reactions?

Which statement about the half-life of a radioactive sample is true?

The alpha decay of a radioactive nuclide (X) emits a He-4 nucleus and produces an isotope of 235/92U. What is X?

After a radioactive atom decays, it is the same element that it was before with no measurable change in mass. Which kind of decay has occurred, and how do you know?

What occurs during one half-life?

Which represents the balanced nuclear equation for the beta plus decay of C-11?

Consider the nuclear equation below. 222/86Rn -> 2/18/?Po + 4/2He Which is the missing value that will balance the equation?

A sample contains 25% parent isotope and 75% daughter isotopes. If the half-life of the parent isotope is 72 years, how old is the sample?

Potassium-40 has a half-life of 1.277 mc013-1.jpg 109 years. After 1.022 mc013-2.jpg1010 years, how much potassium-40 will remain from a 500.3-g sample?