Which group shows the correct order of first ionization energy?

Ca > Na > K Al > Si > P K > Ca > Ge
Na > P > Cl
Cs < Rb < Na

I know the closer the element is to the right side of the table, group 8, the higher the ionization level, and the lower the group, the lower the ionization energy. What does it mean when it says "first ionization energy"

You can look up the 1st ionization potential of all the metals at www.webelements.com

"First ionization energy" refers to the energy required to remove the first electron from an atom to form a positively charged ion. It is a measure of how tightly an atom holds onto its electrons. The higher the ionization energy, the more difficult it is to remove an electron.

Now, let's analyze the options given and determine the correct order of first ionization energy:

Ca > Na > K: This order is incorrect because the first ionization energy generally decreases down a group. So, the correct order would be K > Na > Ca.

Al > Si > P: This order is correct because the first ionization energy generally increases across a period from left to right.

K > Ca > Ge: This order is incorrect because the first ionization energy generally increases across a period from left to right. So, the correct order would be Ca > K > Ge.

Na > P > Cl: This order is incorrect because the first ionization energy generally increases across a period from left to right. So, the correct order would be Cl > P > Na.

Cs < Rb < Na: This order is correct because the first ionization energy generally decreases down a group.

Based on this analysis, the correct order of first ionization energy is:
Al > Si > P > Cl > Na > K > Ca > Ge > Rb > Cs

When it says "first ionization energy," it refers to the amount of energy required to remove the outermost electron from an atom of an element in its gaseous state. It is important to note that the first ionization energy generally increases from left to right within a period (row) on the periodic table and decreases from top to bottom within a group (column).

Now, let's analyze the given options:

Ca > Na > K: This order is correct since Ca is closer to the right side of the table than Na and K.

Al > Si > P: This order is also correct as Al is closer to the right side of the table than Si and P.

K > Ca > Ge: This order is incorrect because K should have a lower first ionization energy compared to Ca and Ge.

Na > P > Cl: This order is incorrect because Na and P should be switched. Na is closer to the left side of the table and should have a lower first ionization energy compared to P.

Cs < Rb < Na: This order is correct since Cs is closer to the left side of the table than Rb and Na.

Therefore, the correct order of first ionization energy is: Cs < Rb < Na.

Once again, not sure why the choices don't show up but here they are:

Ca>Na>k
Al>Si>P
K>Ca>Ge
Na>P>Cl
Na>Rb>Cs