PRETEST Q3M1-PHYSICAL SCIENCE

Which nuclear reaction takes place in the star?

• fission

• fusion

• beta decay

• gamma decay

• ACTIVE

• NEUTRAL

• STABLE

• UNSTABLE

Which type of nuclear transformation involves the splitting of a heavy nucleus into a more stable and lighter nucleus?

• alpha decay

• gamma decay

• nuclear fission

• nuclear fusion

What happens to the atomic number of the parent element when alpha decay takes place?

• decreases by 2

• increases by 2

• decreases by 4

• increases by 2

Which is the daughter element?

• 
• 
• 

What type of nuclear transformation had taken place?

• alpha decay

• beta decay

• gamma decay

Which elements where first synthesized in the universe seconds after big bang?

• Be & C

• H & He

• He & Li

• Li & Be

Which process will produce elements heavier than iron (Fe) in the stars?

• C-N-O cycle

• neutron capture

• proton-proton fusion

• big bang nucleosynthesis

Which nuclear fusion equation is example of stellar nucleosynthesis?

• deuterium (H-2) fuse with a proton produce He-3

• tritium (H-3) fuse with deuterium produces He-4 and neutron

• neon-20 combines with He-4 produces Magnesium-24 and emit gamma rays

Which of the following is the correct chronological order of events in the synthesis of heavy elements?

• I, II, III, IV

• I, III, IV, II

• III, I, II, IV

• IV, III, II, I