Who used the Law of the Octave to arrange atoms?
10 In the mordern form of Mendeleev peroidic table, elements are arranged in __________ horizontal rows.
11 According to __________, an orbital can have at the most two electrons of opposite spin.
12 ____________ is defined as the energy released or absorbed when an electron is added to the gaseous atom in its ground state.
9. John Newlands 10. 7 11. Exclusionprinciple 12. Electronaffinity