As one traverses the periodic table from left to right,the effective nuclear charge Z_eff increases.As a result of this the periodic properties of A)atomic size increases,IE increases,EA increases and electronegativity increases. B)atomic size decreases,IE increases,EA increases and electronegativity increases. C)atomic size decreases,IE decreases,EA increases and electronegativity increases. D)atomic size decreases,IE increases,EA decreases and electronegativity increases.

Question

Quizplus · Accepted Answer

As we move from left to right across a period, the effective nuclear charge experienced by the valence electrons increases due to the increasing number of protons in the nucleus. This results in a decrease in atomic size because the increased attraction between the nucleus and the electrons causes the electron cloud to become more compact. Additionally, the increase in effective nuclear charge leads to an increase in ionization energy (IE) because it becomes more difficult to remove an electron from the atom. Electron affinity (EA) also increases because the atom has a stronger attraction to additional electrons. Finally, electronegativity increases because the atom has a stronger tendency to attract electrons towards itself when it forms a chemical bond. All of these trends are consistent with choice B.

As One Traverses the Periodic Table from Left to Right,the