उस वैज्ञानिक का नाम बताइए जिसने 'प्लम पुडिंग' मॉडल का प्रस्ताव दिया था, जिसमें यह सुझाव दिया गया था कि इलेक्ट्रॉन एक धनात्मक गोले में धंसे होते हैं।

Which postulate of Dalton's Atomic Theory was proven incorrect by the discovery of subatomic particles?

What is the correct chemical symbol for a species containing 20 protons, 18 electrons, and 22 neutrons?

Which of the following sets of quantum numbers are permissible? (J) n = 3, ℓ = 3, m = 2, s = +12 (K) n = 2, ℓ = 2, m = 1, s = -12 (L) n = 1, ℓ = 0, m = 0, s = -12 (M) n = 3, ℓ = 2, m = 1, s = -12 Choose the correct option: