As we move from left to right along a period, there is a decrease in nuclear charge which tends to pull the electrons away from the nucleus.
A. Both (I) and (III)
B. Both (II) and (III)
C. Both (I) and (IV)
D. Both (II) and (IV)
Answer:D
As we move from left to right along a period, there is a decrease in nuclear charge which tends to pull the electrons away from the nucleus.
A. Both (I) and (III) B. Both (II) and (III) C. Both (I) and (IV) D. Both (II) and (IV)
Explanation: As we move from left to right along a period we see that the atomic radius decreases. This is due to an increase in nuclear charge which tends to pull the electrons closer to the nucleus and reduces the size of the atom.