MCQs

Q451: A process in which two light nuclei combine to form a heavier nucleus is called?

• A) Nuclear fusion
• B) Nuclear fission
• C) Beta-decay

Q452: The splitting of a heavy nucleus into smaller nuclei is called?

• A) Fusion
• B) Fission
• C) Half-life

Q453: The main source of energy in the stars is _____?

• A) Chemical reaction
• B) Nuclear fission
• C) Nuclear fusion

Q454: A powder contains 100mg of a radioactive material that emits α-particles. (See in detail)

• A) 0mg
• B) 25mg
• C) 50mg

Q455: The type of radiation that travels in a straight line across an electric field is a/an?

• A) Proton
• B) Electron
• C) γ-particle

Q456: A radioactive decay can be represented as shown. 91Pa^233 ---> 92U^233 +...... The emitted particle is a/an?

• A) α-emission
• B) β-emission
• C) γ-emission

Q457: A radioactive element emits a particle from the nucleus of one of its atoms. The particle comprises two protons and two neutrons. The name of this process is called?

• A) α-emission
• B) β-emission
• C) γ-emission

Q458: A radioactive nuclide emits a β-particle. The atomic number (proton number) of the nucleus number of ______?

• A) Stays the same
• B) Decreases by 2
• C) Increases by 1

Q459: The α-radiation is _______?

• A) A stream of fast-moving electrons
• B) A form of electromagnetic radiation
• C) Highly ionizing than γ-radiation

Q460: If an element B has five protons and six neutrons what will be the symbol of element B _____?

• A) 115B
• B) 11B
• C) 115B