What is the trend for effective nuclear charge when going from left to right across a period in the periodic table? (Hint: Effective nuclear charge is also commonly referred to as effective charge or shielding effect.)
A. Effective nuclear charge increases.
B. Effective nuclear charge decreases.
C. Effective nuclear charge remains constant.
D. Effective nuclear charge fluctuates.
Answer:A
What is the trend for effective nuclear charge when going from left to right across a period in the periodic table? (Hint: Effective nuclear charge is also commonly referred to as effective charge or shielding effect.)
A. Effective nuclear charge increases. B. Effective nuclear charge decreases. C. Effective nuclear charge remains constant. D. Effective nuclear charge fluctuates.
Explanation: When going from left to right across a period, the number of protons in the nucleus increases, which increases the attractive force that the nucleus exerts on the electrons in the outermost energy level. The increase in nuclear charge is not completely offset by the additional shielding of the electrons in inner energy levels, so the effective nuclear charge increases.