10 Questions
What is lattice enthalpy?
The energy required to completely separate one mole of a solid ionic compound into gaseous constituent ions
Why is it not possible to calculate lattice enthalpy directly from the interaction of forces of attraction and repulsion only?
Because the lattice enthalpy is influenced by the crystal geometry
How is bond length defined in a molecule?
As the distance between the nuclei of two bonded atoms
What is the covalent radius of an atom in a covalent bond?
The radius of an atom's core which is in contact with the core of an adjacent atom in a bonded situation
How are bond lengths typically measured?
By spectroscopic, X-ray diffraction, and electron-diffraction techniques
What does the van der Waals radius represent for an atom?
The overall size of the atom including its valence shell
Why does He2 molecule not exist?
Its bond order is zero, indicating instability
How is the electronic configuration of Li2 molecule different from Li atom?
Li2 has more electrons than Li
Why is C2 molecule diamagnetic?
It contains no electrons in antibonding molecular orbitals
How many electrons are present in O2 molecule based on the given text?
16 electrons
Learn about lattice enthalpy, which is the energy required to separate one mole of an ionic solid into gaseous ions. Explore how this process involves attractive and repulsive forces between ions, using the example of NaCl with a lattice enthalpy of 788 kJ mol–1.
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