Reference no: EM133245727
True and False
1. Electronegativity of the atoms forming a covalent chemical bond determines if the bond is a polar bond.
2. Atomic packing factor (APF) of fcc unit is the same for Al, Cu, Au, Ni and Pt.
3. In solid materials (e.g crystals), the unit cells are all cubics.
4. in visible spectrum, the energies of red lines are smaller than purple lines.
5. The emission spectrum of hydrogen atom formed by the spectral lines in Balmer series are in the UV-Vis region.
6. The emission spectrum of hydrogen atom formed by the spectral lines in Balmer series is from higher energy levels to lower energy levels.
7. lattice energy is the change in energy that occurs when an ionic solid is separated into ions.
8. The oxygen molecule (O2) has even number of electrons and hence O2 is closed shell in the ground state.
9. MOFs usually consist of a metal ions or metal clusters, and organic ligands which form into large arrays.
10. MOFs are coordination compounds.
11. The charge of the central metal Pt in Pt(NH3)2Cl4 complex is IV.
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