Arrange the following elements from highest to lowest ionization energy:
The options are:
a) Be, Mg, Ca, Rb, Y
b) Be, Mg, Ca, Rb, Sr
c) Rb, Sr, Ca, Be, Mg
d) Rb, Sr, Ca, Mg, Be
e) Be, Mg, Ca, Sr, Rb
is it d)?
Yes, you are correct. The correct answer is d) Rb, Sr, Ca, Mg, Be. Ionization energy generally increases from left to right across a period and decreases from top to bottom within a group in the periodic table. Therefore, Rb has the highest ionization energy, followed by Sr, Ca, Mg, and Be with the lowest ionization energy.
To arrange the given elements from highest to lowest ionization energy, we need to consider the trend in ionization energy across the periodic table. Ionization energy generally increases from left to right across a period and decreases from top to bottom within a group.
Let's analyze each option and determine the correct answer:
a) Be, Mg, Ca, Rb, Y:
In this option, the ionization energy is expected to increase from Be to Y. Rb and Y are located on the right side of the periodic table and have higher ionization energies. However, Mg and Ca are located to the left of Be but have higher ionization energies than Be. Therefore, this option is not correct.
b) Be, Mg, Ca, Rb, Sr:
This option follows the trend of increasing ionization energy from Be to Rb. However, Sr, which is located to the right of Rb, should have a higher ionization energy. Therefore, this option is not correct.
c) Rb, Sr, Ca, Be, Mg:
In this option, the elements are arranged in the reverse order of their positions on the periodic table. The ionization energy is generally expected to increase from left to right and decrease from top to bottom. Therefore, this option is not correct.
d) Rb, Sr, Ca, Mg, Be:
This option follows the trend of increasing ionization energy from Be to Rb, which is correct. Rb has the highest ionization energy, and Be has the lowest ionization energy. Therefore, this option is the correct answer.
e) Be, Mg, Ca, Sr, Rb:
This option follows the trend of increasing ionization energy from Be to Rb. However, Sr is expected to have a higher ionization energy compared to Ca. Therefore, this option is not correct.
Therefore, the correct answer is option d): Rb, Sr, Ca, Mg, Be.
To determine the order of ionization energy, we need to understand that ionization energy generally increases from left to right across a period and decreases from top to bottom within a group on the periodic table.
Let's analyze the options:
a) Be, Mg, Ca, Rb, Y - This order is inconsistent with the trend in ionization energy.
b) Be, Mg, Ca, Rb, Sr - This order is consistent with the trend in ionization energy, where ionization energy increases from Be to Sr.
c) Rb, Sr, Ca, Be, Mg - This order is inconsistent with the trend in ionization energy.
d) Rb, Sr, Ca, Mg, Be - This order is inconsistent with the trend in ionization energy, as Mg has a higher ionization energy compared to Ca.
e) Be, Mg, Ca, Sr, Rb - This order is inconsistent with the trend in ionization energy.
Therefore, the correct answer is option b) Be, Mg, Ca, Rb, Sr.