Question

Nuclear fusion is the splitting of atomic nuclei into smaller fragments; nuclear fission is the opposite of this process.

TRUE

FALSE




A thermonuclear chain reaction is considered to be a:

self-sustaining reaction in which the products cause new reactions

fusion reaction because new material is combined many times

common phenomenon for all unstable uranium atoms

proton creation process that initiates other uncontrollable reactions




Daughter atoms X and Y are formed from the fission of atom Z. Which of the following statements is true about X and Y?

The combined atomic mass of X and Y will be greater than the mass of atom Z.

The atomic masses of elements X and Y will always equal the exact atomic mass of Z.

High temperatures are required to make atoms X and Y.

Atoms X and Y will have a smaller combined atomic mass than atom Z.


Which condition is necessary for fusion to occur?

unstable isotopes

high temperatures

heavy isotopes

neutrons



Two fissionable substances commonly used in nuclear reactors and nuclear weapons include uranium-235 and plutonium-239.

TRUE

FALSE

Answer 1

TRUE

common phenomenon for all unstable uranium atoms

q3 not sure maybe The atomic masses of elements X and Y will always equal the exact atomic mass of Z.

high temperatures

FALSE

Answer 2

given below.

Step-by-step explanation:

1) True

In nuclear fusion atomic nuclei splits and in nuclear fission atomic nuclei combines.

2) correct answer is option A

self sustaining reaction product causes new reactions.

3) correct answer is option A

in nuclear fission the combined atomic mass of daughter nuclei is more than the parent nuclei.

4) correct answer is option B.

high temperature is the must requirement for fusion to take place because it gives hydrogen atoms enough energy to overcome the electrical repulsion between the protons.

5) True

uranium-235 is used in nuclear reactors where as plutonium-239 is used in making of nuclear weapons.