Atomic And Nuclear Physics - SS3 Physics Past Questions and Answers - page 2
The periodic table is arranged according to what properties of the elements?
Atomic mass
Number of electrons
Number of protons
Atomic number
What is the periodic table?
The periodic table is a tabular arrangement of the chemical elements based on their atomic structure and chemical properties. The table is arranged in rows and columns, where each element is placed in a specific location based on its atomic number, electron configuration, and chemical behaviour.
What purpose has the periodic table served?
The periodic table is also used extensively in industry and technology, as many materials and compounds are based on the properties of specific elements and their combinations.
Which of the following particles has the least penetrating power?
Alpha particles
Beta particles
Gamma rays
Neutrons
Which of the following is a type of radioactive decay where an electron is emitted from the nucleus?
Alpha decay
Beta decay
Gamma decay
Neutron decay
The half-life of a radioactive substance is defined as:
The time it takes for half of the substance to decay
The time it takes for all of the substance to decay
The time it takes for the substance to reach its maximum activity
The time it takes for the substance to emit a gamma ray
Which of the following isotopes is commonly used in medical imaging?
Carbon-14
Uranium-235
Iodine-131
Plutonium-239
Which of the following radiation types is most harmful to the human body?
Alpha particles
Beta particles
Gamma rays
Neutrons
Which type of radiation is the most penetrating?
Alpha
Beta
Gamma
Neutron
What is alpha decay?
In alpha decay, a heavy, unstable nucleus emits an alpha particle, which is a helium nucleus consisting of two protons and two neutrons. This decreases the atomic number of the nucleus by two and the mass number by four.