Kuiz Fizik Tingkatan 5 Bab 6 Set 1

SELAMAT DATANG Kuiz Fizik Tingkatan 5 Bab 6 Set 1

KUIZ INI MENGANDUNGI 10 SOALAN

Which of the following describes a nuclear chain reaction?

A chemical reaction where the products catalyze the next stage of the reaction.

A self-sustaining process where neutrons released in one fission event trigger further fission events.

A series of alpha and beta decays that occur until a stable nucleus is formed.

The fusion of multiple hydrogen nuclei in a sequential manner within a star.

None

During beta decay, a neutron within the nucleus is transformed. What are the products of this transformation?

A proton and a neutron.

Two protons and an electron.

An alpha particle.

A proton and an electron.

None

Which statement correctly distinguishes nuclear fission from nuclear fusion?

Fission is the splitting of a heavy nucleus, while fusion is the combining of light nuclei.

Fission involves uranium, while fusion involves lead.

Fission occurs naturally in the Sun, while fusion is used in nuclear power plants.

Fission releases energy while fusion absorbs energy.

None

According to Albert Einstein's equation E=mc2 , the 'm' represents the mass defect. What is the mass defect in a nuclear reaction?

The total mass of the initial nucleus before the reaction begins

The mass of the energy that is released during the reaction

The average mass of the nuclei involved in the reaction

The difference in mass between the reactants and the products

None

What happens to the atomic nucleus during gamma decay?

A neutron transforms into a proton and an electron.

It emits two protons and two neutrons.

It transitions from a higher energy state to a lower energy state without changing its composition.

It splits into two smaller nuclei.

None

In the equation E=mc2, what does the 'c' represent?

The rate of radioactive decay.

The speed of light in a vacuum.

The mass of a carbon-12 atom.

The charge of an electron.

None

A radioactive substance has a half-life of 15 minutes. If you start with a sample of this substance, what fraction of the original radioactive nuclei will remain undecayed after one hour?

1/8

1/16

1/4

1/2

None

What is the fundamental process that defines radioactive decay?

A stable nucleus absorbs external energy and becomes unstable.

An unstable nucleus transforms into a more stable one by emitting radiation.

Two light nuclei combine under high pressure to form a heavier nucleus.

A heavy nucleus splits into two or more lighter nuclei when struck by a neutron.

None

During beta decay, a neutron in an unstable nucleus transforms. What is the effect on the nucleon number (A) and the proton number (Z) of the nucleus?

The nucleon number (A) remains the same, while the proton number (Z) increases by one.

The nucleon number (A) decreases by four, and the proton number (Z) decreases by two.

The nucleon number (A) decreases by one, while the proton number (Z) remains the same.

Both the nucleon number (A) and the proton number (Z) remain unchanged.

None

10.

Why is the method of dating rocks using the Uranium-238 to Lead-206 decay series effective for estimating the age of the Earth?

Uranium-238 has a very short half-life, allowing for precise measurements.

The decay process is heavily influenced by temperature and pressure within the Earth’s crust.

Uranium-238 has a very long half-life, comparable to the age of the Earth.

Lead-206 is a highly radioactive element that decays quickly.

None

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