Question

I'm a really stuck in this. I kind of suck in chemistry, please help me. I would really appreciate it.

I have to write one to two paragraphs about : What is the relationship between the atomic numbers and ionic radii of the elements in group 1?

And

What is the relationship between atomic numbers and first ionization energies?

These Are The Elements in group 1 of the periodic table:

lithium
sodium
potassium
rubidium
cesium

Answer 1

I'll get you started, atomic number is the number of protons, the more protons the bigger the atom, the bigger the radius. You can find the numbers here:
http://www.ptable.com
http://www.ptable.com/#Property/Radius/Calculated

Answer 2

My chemistry is not that good, but research is....
From what I've looked up at least;
While you go higher in columns (lowering the atomic number) the energy goes up, as you go to the right across the periodic table (increasing atomic number) the ionization energy goes up. Meaning that as atomic number goes up, energy can be going up or down.

Answer 3

Thanks doc, I'll check those links out !

Answer 4

For the first question, I have no clue.

Answer 5

Do you know what is ionization energy?

Answer 6

p.s. teachers love graphs

Answer 7

Shamil, So if the atomic number is low, the energy goes higher?
Example: Soduim atomic number is 11, and it's Iozantion Energy is 496.

I would say that as the atomic number decrease the Ioz. Energy is increasing?

Answer 8

Here are the ionization energies
http://www.ptable.com/#Property/Ionization

Answer 9

atlas, I honestly don't, ;c

&Doc, I already had to make a graph I wish I had that from the beginning But I don't understand why you graphed protons?

Answer 10

Ionization energy = how much energy you have to cram into an atom to pop the electron off.
When you stick the electron back of you get exactly that amount of energy back.

Answer 11

Atomic number = number of protons.

Answer 12

If you go by rows to the right in a periodic table the atomic number increases and so does ioz. If you go by columns by going up the atomic number decreases but the ioz increases.

Answer 13

The bigger the atom, the easier it is to pop an electron off. It requires less energy because it's further away from the protons in the middle.

Answer 14

Shamil, That's exactly what I needed to know for number two. Thanks so much !

Answer 15

mhm.

Answer 16

@ doc: I'm kind of confused. Can I show the table I made from gathering information about each element in the group?

Answer 17

So then you could point out to me how could figure it out better?

Answer 18

Ionization energy is the energy needed to spill an electron out of an atom

Answer 19

Imagine protons are teachers in your classroom and students are the electrons (this analogy does not hold exactly as the number of protons is equal to number of electrons in an atom).
Now lets say the teachers are strict and they hold the children to the classroom. There is a backdoor in the class and your friend is sitting in the backbench.

Answer 20

you want your friend out (spilling an electron - ionization)

Answer 21

Now it is more difficult to do so when the number of teachers in the classroom is more (when the number of protons are more). It will be more difficult to pull your friend out through the backdoor

Answer 22

But with further increase in atomic number, the number of students (electrons) also increase........>>>So your friend at the back will be further from the teachers

Answer 23

and so at a certain point of time, it becomes easier to pull your friend out inspite of more number of teachers in the front of your class

Answer 24

Now imagine this analogy with electrons and protons in an atom

Answer 25

Best example anyone ever gave me in chemistry. ! Makes so much sense now. Thanks (:

All of you guys had great responses, don't have a clue who to give a medal to. lol But I appreciate for the help. [8

Answer 26

You are welcome :)