i love chemistry

[logistic_guy]

For each of the following pairs, indicate which element has the smaller first ionization energy:

\(\displaystyle \bold{(a)} \ \text{Ti}, \text{Ba}\)
\(\displaystyle \bold{(b)} \ \text{Ag}, \text{Cu}\)
\(\displaystyle \bold{(c)} \ \text{Ge}, \text{Cl}\)
\(\displaystyle \bold{(d)} \ \text{Pb}, \text{Sb}\)

 

[khansaheb]

first ionization energy

Please define "first ionization energy"

Please show us what you have tried and exactly where you are stuck.

Please follow the rules of posting in this forum, as enunciated at:

READ BEFORE POSTING​

Please share your work/thoughts about this problem

 

[logistic_guy]

Please define "first ionization energy"

I'm sorry Sir Khan, you gotta be an artist to understand the first ionization energy.

I'm an artist. You're not!

Therefore,

\(\displaystyle \bold{(a)}\)

\(\displaystyle \text{Ba} \rightarrow \ \text{Barium}\) has the smaller first ionization energy.

Why? I will leave it for you as an exercise to discover that out.

 

[khansaheb]

I'm an artist. You're not

I am a scientist - you are not.

 

[logistic_guy]

I am a scientist - you are not.

Then, you must be very old to be in here!

\(\displaystyle \bold{(b)}\)

\(\displaystyle \text{Ag} \rightarrow \ \text{Silver}\) has the smaller first ionization energy.

why? I am counting on the scientist Sir Khan Saheb to enlighten the audience of the reason behind that.

 

[logistic_guy]

\(\displaystyle \bold{(c)}\)

\(\displaystyle \text{Ge} \rightarrow \ \text{Germanium}\) has the smaller first ionization energy.

I'm sure that when the time is right @khansaheb will enlighten the audience and the seniors why that was the answer (He is a scientist!).

meow

 

[logistic_guy]

\(\displaystyle \bold{(d)}\)

\(\displaystyle \text{Pb} \rightarrow \ \text{Lead}\) has the smaller first ionization energy.

Here is the deal!
How to decide quickly which element has the smaller first ionization energy?

\(\displaystyle \bold{1.}\) You look at the periodic table. If the two elements are in the same group, the one at the bottom has the smaller first ionization energy.
\(\displaystyle \bold{2.}\) If the two elements are in the same period, the one at the left has the smaller first ionization energy.
\(\displaystyle \bold{3.}\) If the two elements are neither in the same group, nor in the same period, the one at the top is \(\displaystyle 99\%\) (Rule of Thumb) has the higher first ionization energy if it is on the left, and \(\displaystyle 100\%\) if it is on the right.

Another way of how to decide which is the longer way is just to calculate the energies.