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DAT: Chemical Bonding Exam Questions and Answers 2024/2025( A+ GRADED 100% VERIFIED).
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DAT: Chemical Bonding Exam Questions and Answers 2024/2025( A+ GRADED 100% VERIFIED).
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DAT: Chemical BondingIonic Bonding - ANS When one or more electrons form an atom with a smaller ionization energy
are transferred to an atom with a greater electron affinity and the resulting ions are held together
by electrostatic forces.
*There is a large difference in electronegativity. A complete transfer of electrons occurs from the
less electronegative atom to the more electronegative atom.
The atom that loses the electrons becomes a cation and the atom that gains electrons becomes
an anion.
Covalent Bonding - ANS A bond formed when atoms share one or more pairs of electrons
They contain discrete molecular units with weak IMFs. Consequently, they have low melting
points and do not conduct electricity in aqueous solutions.
Polar Covalent Bonds - ANS Bonds in which electrons are not shared equally between atoms
of different elements in a compound. The bonds are partially covalent and partially ionic.
Characteristics of Ionic Bonds - ANS Form crystal lattices, high melting points, high boiling
points
Due to strong electrostatic forces between the ions. They can also conduct electricity in the
liquid and aqueous states, but not in the solid states.
Properties of Covalent bonds - ANS Sharing can occur in a single, double, or triple bond. The
number of shared electron pairs is referred to as the bond order.
Bond Length - ANS The average distance between the two nuclei of the atoms involved in the
bond. As the number of shared electron pairs increases, the two atoms are pulled closer
together.
A triple bond is shorter than a double bond, etc.
Bond Energy - ANS The energy required to separate two bonded atoms. It increases as the
number of shared electron pairs increases.
Formal Charge - ANS FC = # of valence electrons - ( # dots + # lines)
sticks aka bonding
dots aka nonbonding
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