As the force of attraction b/w the valence electron and the nucleus _ with the increase in atomic radius, the electron affinity usually _
Correct answer: D. decreases, decreases
- A. decreases, increases
- B. decreases, remains same
- C. increases, decreases
- D. decreases, decreases
Explanation
The less valence electrons an atom has, the least likely it will gain electrons. Electron affinity decreases down the groups and from right to left across the periods on the periodic table because now the electrons are in a higher energy level far from the control of the nucleus, thus a decrease from the attraction of nucleus.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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