Hi. My teacher is giving us a test tomorrow on quantum numbers and Iunderstand it except for Noble gas configuration. I saw the question below on it but it's not really what I need to know so any help would be great. :)
Question: My teacher said he'll give us a question like this "What is the noble gas configuration of Ag?"
How would one goes about solving that?
I don't know because Ag doesn't have a noble gas configuration. Ag^+ does but not Ag metal. Let's take a smaller atom, such as chlorine, atomic number 17.
It is 1s2 2s2 2p6 3s2 3p5 = 17
Adding an electron to make the noble gas, Ar = 18, gives
1s2 2s2 2p6 3s2 2p6 = 18.
I assume this is what you teacher meant.
After reading another unrelated question that Bob Pursley answered, you MAY be talking about putting this in "noble gas" configuration status, which is, for Cl, instead of writing
1s2 2s2 2p6 3s2 3p5 (=17)(that is, listing ALL of the electrons)
we would write
[Ne]3s2 3p5 and the [Ne] takes care of the first eight electrons.
Silver would be [Kr]4d10 5s1 in which [Kr] takes care of the first 36 electrons.
You can go to www.webelements.com and see that notation for all the elements. I hope this helps.
To solve the question "What is the noble gas configuration of Ag?", you need to understand the concept of noble gas configuration. Noble gas configuration is a shorthand way of representing the electron configuration of an atom or ion by using the electron configuration of the nearest noble gas as a starting point.
Let's start by finding the electron configuration of Ag. The atomic number of silver (Ag) is 47, which means it has 47 electrons. The electron configuration of Ag without using the noble gas configuration is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d9.
To find the noble gas configuration, we need to look for the nearest noble gas, which is Krypton (Kr), located in the fourth period. Kr has an electron configuration of 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6.
To represent the noble gas configuration of Ag, we need to replace the electron configuration of Kr up to its last orbital with the electron configuration of Ag. So, the noble gas configuration of Ag is [Kr] 5s2 4d9.
In this notation, [Kr] represents the electron configuration of Kr up to its last orbital, and the remaining electron configuration of Ag is added after it.
Remember, noble gas configuration is a convenient way to represent the electron configuration of an atom or ion by starting from the electron configuration of the nearest noble gas and adding the remaining electrons.