Definition of radioactivity: Radioactivity is the spontaneous emission of which radiations from unstable nuclei? State the complete set commonly observed. Choose the correct option.

Q: Definition of radioactivity: Radioactivity is the spontaneous emission of which radiations from unstable nuclei? State the complete set commonly observed. Choose the correct option.

Concept / Approach Radioactivity involves the spontaneous emission of α (helium nuclei), β (electrons/positrons), and γ (high-energy photons) from unstable atomic nuclei. Final Answer α, β, and γ radiations.

Difficulty: Easy

Alpha (α) particles only
Beta (β) particles only
Gamma (γ) rays only
Alpha (α), beta (β), and gamma (γ) radiations

Correct Answer: Alpha (α), beta (β), and gamma (γ) radiations

Explanation:

Concept / Approach
Radioactivity involves the spontaneous emission of α (helium nuclei), β (electrons/positrons), and γ (high-energy photons) from unstable atomic nuclei.

Final Answer
α, β, and γ radiations.

← Previous Question Next Question→

More Questions from Biology

Blood clotting factors: Prothrombin, essential for coagulation, is released/produced by which organ? Consider the site of plasma protein synthesis and vitamin K–dependent factors. Choose the correct organ.
Comparative anatomy — snake venom glands: The poison glands of snakes are homologous to which glands in other vertebrates? Identify the correct homologous structure. Choose the correct option.
Plant ecology terminology: Identify the term for plants that grow under average (moderate) temperature and moisture conditions. Full question: Plants that thrive in neither arid nor aquatic habitats—i.e., typical, moderate environments—are called what? Choose the correct option.
Plant morphology: Determine which organ the edible potato (Solanum tuberosum) is a modified outgrowth of. Full question: Potato is a modified form (outgrowth) of which plant organ? Identify the precise botanical classification. Choose the correct option.
Human physiology (transport of gases): Name the protein that carries oxygen in the blood. Full question: Oxygen in our blood is primarily transported bound to which protein molecule? Choose the correct option.
Medical microbiology: Match the pathogen to the disease—Vibrio ‘‘comma’’ bacillus causes which illness? Context: Mycobacterium leprae → leprosy; Corynebacterium diphtheriae → diphtheria. Choose the correct disease caused by Vibrio comma (Vibrio cholerae).
Ichthyology (fish buoyancy): Identify the anatomical feature that prevents most bony fishes from sinking. Full question: Most fish do not sink in water primarily because of which internal structure? Choose the correct option.
Plant ecology: Classify plants that develop under dry (arid) environmental conditions. Full question: Plants adapted to and developing in dry conditions are referred to by which term? Choose the correct option.
Habitat terminology: Name the plants that characteristically grow on sandy soils/substrates. Full question: Plants growing on sand (e.g., dunes and sandy shores) are called what? Choose the correct option.
Human genetics: State the total chromosome number found in individuals with Down's syndrome (Trisomy 21). Full question: Number of chromosomes present in Down's syndrome is what? Choose the correct option.

Discussion & Comments

No comments yet. Be the first to comment!

Join Discussion