Home › CBSE Class 11 › Chemistry › Atoms and Molecules › Per NCERT §3.2, John Newlands' LAW OF OCTAVES (1…
Per NCERT §3.2, John Newlands' LAW OF OCTAVES (1865) noted what about elements arranged by increasing atomic weight?
AEvery fifth element had identical mass
BElements split into two halves perfectly
CAtomic weight = group number
DEvery eighth element had properties similar to the first, like notes in an octave of music
Answer & Solution
Correct answer: D. Every eighth element had properties similar to the first, like notes in an octave of music
Per NCERT §3.2, Newlands' Law of Octaves — every 8th element resembled the 1st (like music). Worked only up to Ca. Davy Medal 1887.
Related questions
The property of attracting shared electrons by halogen atoms in a molecule is called:Calculate the mass percentage of sulphur in sulphuric acid, H2SO4. (Atomic masses: H = 1, How many atoms of oxygen are present in 5 moles of CO2? (NA = 6.023 x 10^23)Calculate the gram molecular mass of calcium phosphate, Ca3(PO4)2. (Atomic masses: Ca = 40What volume at STP is occupied by 2.5 mole of CO2 gas? (Molar volume = 22.4 litre)How many molecules of water are present in 54 g of H2O? (Molecular mass of H2O = 18, NA = Calculate the number of molecules present in 11.2 litre of CO2 measured at STP. (NA = 6.02Boron occurs as B-10 (20% abundance) and B-11 (80% abundance). Calculate its average atomi