Question

Who used the Law of the Octave to arrange atoms?
John Newlands
Meyer
De Chancourtois
Dobereiner
10 In the mordern form of Mendeleev peroidic table, elements are arranged in __________ horizontal rows.
6
7
8
9
11 According to __________, an orbital can have at the most two electrons of opposite spin.
Aufbau principle
Henry's law
Hund's rule
Exclusion principle
12 ____________ is defined as the energy released or absorbed when an electron is added to the gaseous atom in its ground state.
Electron affinity
Electronegativity
Ionization potential
Hydration energy

Answer 1

9. John Newlands
10. 7
11. Exclusionprinciple
12. Electronaffinity