Question 1

In &#946; + decay, the nucleon number is&#10;A)conserved&#10;B)not conserved&#10;C)unstable&#10;D)stable

Accepted Answer

In β+ decay, a proton inside the nucleus is converted into a neutron, a positron (β+), and a neutrino. The total number of nucleons (protons and neutrons) remains the same, thus the nucleon number is conserved.

Question 2

Particles that are un affected by strong nuclear force are&#10;A)protons&#10;B)leptons&#10;C)neutrons&#10;D)bosons

Accepted Answer

Leptons, such as electrons, muons, and neutrinos, do not participate in the strong nuclear force, which primarily affects hadrons (protons and neutrons).

Question 3

Number of isotopes neon has is&#10;A)2&#10;B)4&#10;C)3&#10;D)5

Accepted Answer

Neon has three stable isotopes: Neon-20, Neon-21, and Neon-22.

Question 4

Phenomena of radioactivity was discovered by Henri Becquerel in&#10;A)1896&#10;B)1895&#10;C)1894&#10;D)1893

Accepted Answer

Henri Becquerel discovered the phenomenon of radioactivity in 1896 while investigating phosphorescence in uranium salts.

Question 5

Radiations emitted by radioactive substances is&#10;A)alpha&#10;B)beta&#10;C)gamma&#10;D)all of above

Accepted Answer

Radioactive substances can emit alpha particles, beta particles, and gamma rays as part of their decay processes.

Question 6

Elements undergo radioactive decay when proton number becomes greater than&#10;A)50&#10;B)40&#10;C)83&#10;D)73

Accepted Answer

Elements tend to undergo radioactive decay when their proton number becomes greater than 83. This is because nuclei with more than 83 protons are typically unstable and prone to radioactive decay processes to achieve stability.

Question 7

Process in which &#945; and &#946; rays pass close to atoms and knock electrons out is called&#10;A)atomization&#10;B)ionization&#10;C)decay&#10;D)hydroxylation

Accepted Answer

Ionization is the process where α (alpha) and β (beta) rays pass close to atoms, knocking electrons out and creating ions.

Question 8

Alpha particles have relatively&#10;A)low kinetic energies&#10;B)high potential energy&#10;C)high mechanical energy&#10;D)high kinetic energy

Accepted Answer

Alpha particles, being helium nuclei, are relatively massive and are often emitted with high kinetic energy during radioactive decay processes. This high kinetic energy is a characteristic feature of alpha particles, enabling them to cause significant ionization but also limiting their penetration depth in materials due to their rapid energy loss.

Question 9

Strongest ionizing radiation is&#10;A)Alpha&#10;B)beta&#10;C)gamma&#10;D)x-rays

Accepted Answer

Alpha particles have the highest mass among the options listed, making them the most strongly ionizing form of radiation. They can cause significant ionization of atoms but have a low penetration depth.

Question 10

The nucleon number consists of&#10;A)Number of electrons&#10;B)Number of protons&#10;C)Number of electrons and protons&#10;D)Number of protons and neutrons

Accepted Answer

The nucleon number, also known as the mass number, is the total count of protons and neutrons in an atom's nucleus.

Question 11

Gamma radiation is emitted in order to&#10;A)excite the atom&#10;B)release excess energy from atom&#10;C)destabilize the atom&#10;D)stabilize the atom

Accepted Answer

The answer of Gamma radiation is emitted in order to&#10;A)excite...

Question 12

Electrons move around nucleus in form of&#10;A)clouds&#10;B)dust particles&#10;C)steam&#10;D)charge

Accepted Answer

The answer of Electrons move around nucleus in form of&#10;A)clouds&#10;B)dust...

Question 13

Particles like kaons and muons etc, were found out by&#10;A)looking at cosmic rays&#10;B)looking at particles in accelerators&#10;C)looking closely at atom&#10;D)both A and B

Accepted Answer

The answer of Particles like kaons and muons etc, were...

Question 14

Type of rays that affect the nucleus are&#10;A)alpha&#10;B)beta&#10;C)gamma&#10;D)EM

Accepted Answer

The answer of Type of rays that affect the nucleus...

Question 15

Force that acts on both quarks and leptons is&#10;A)strong nuclear force&#10;B)weak interaction&#10;C)intermediate interaction&#10;D)nuclear force

Accepted Answer

The answer of Force that acts on both quarks and...

Question 16

Particles that experience strong force are&#10;A)leptons&#10;B)hadrons&#10;C)both A and B&#10;D)softons

Accepted Answer

The answer of Particles that experience strong force are&#10;A)leptons&#10;B)hadrons&#10;C)both A...

Question 17

Heavy nuclei have&#10;A)more protons than neutrons&#10;B)more electrons than neutrons&#10;C)more neutrons than electrons&#10;D)more neutrons than protons

Accepted Answer

The answer of Heavy nuclei have&#10;A)more protons than neutrons&#10;B)more electrons...

Question 18

A decay in which a proton decays in to neutron and an electron neutrino is&#10;A)&#946;+ decay&#10;B)&#946;-&#10;C)&#947; decay&#10;D)&#945; decay

Accepted Answer

The answer of A decay in which a proton decays...

Question 19

Photon of electromagnetic radiation is&#10;A)&#945; ray&#10;B)&#946; ray&#10;C)&#947; ray&#10;D)x-ray

Accepted Answer

The answer of Photon of electromagnetic radiation is&#10;A)&#945; ray&#10;B)&#946; ray&#10;C)&#947;...

Question 20

Mass of alpha particle is&#10;A)50 times the mass of electron&#10;B)100 times the mass of electron&#10;C)500 times the mass of electron&#10;D)1000 times the mass of electron

Accepted Answer

The answer of Mass of alpha particle is&#10;A)50 times the...

Question 21

Particle which explains about mass of matter is called&#10;A)Higgs boson&#10;B)protons&#10;C)leptons&#10;D)neutrons

Accepted Answer

The answer of Particle which explains about mass of matter...

Question 22

Plum pudding model describes atom as&#10;A)negative pudding with positive plums&#10;B)negative pudding&#10;C)positive pudding with negative plums&#10;D)positive pudding only

Accepted Answer

The answer of Plum pudding model describes atom as&#10;A)negative pudding...

Question 23

Lepton among them are&#10;A)electrons&#10;B)neutrinos&#10;C)protons&#10;D)both A and B

Accepted Answer

The answer of Lepton among them are&#10;A)electrons&#10;B)neutrinos&#10;C)protons&#10;D)both A and B...

Question 24

Density of proton is equal to density of&#10;A)electron&#10;B)atom&#10;C)neutron&#10;D)neutrino

Accepted Answer

The answer of Density of proton is equal to density...

Deck 24: Radiation and Nuclear Science Basics