condensed (noble gas core) configuration for Ag, Br-, Ga3+
Here is a link to a site that gives you everything you ever wanted to know about elements and then some.
Go to the site, click on the element, then scroll down to "electron shell properties" and you're there.
you didn't leave a link
I thought I did. Sorry.
http://www.webelements.com/
i don't understand?
Ag is here.
http://www.webelements.com/silver/atoms.html
Br is here. Add one electron to the outside shell (the 4p) for Br^-
http://www.webelements.com/bromine/
Here is Ga. Subtract 3 electrons from the outside (4s and 4p).
http://www.webelements.com/gallium/
To determine the condensed (noble gas core) configuration for Ag, Br-, and Ga3+, we first need to understand the concept of noble gas core configuration.
Noble gas core configuration refers to the electron configuration of the noble gas that comes before the element in the periodic table. Noble gases have fully filled electron shells, making them stable and unreactive. The noble gas closest to the element in question is used as the starting point for writing the condensed configuration.
Now, let's determine the condensed (noble gas core) configuration for each of the given elements:
1. Silver (Ag):
The atomic number of silver is 47. We can find silver in the fifth period of the periodic table. The noble gas just before silver is krypton (Kr), which has an electron configuration of [Ar] 3d10 4s2 4p6. To write the condensed configuration for silver, we use the noble gas core configuration of krypton followed by the remaining electron configuration: [Kr] 5s2 4d9.
Therefore, the condensed (noble gas core) configuration for silver (Ag) is [Kr] 5s2 4d9.
2. Bromine ion (Br-):
Bromine has an atomic number of 35. It is in the fourth period of the periodic table. The noble gas just before bromine is argon (Ar), which has an electron configuration of [Ne] 3s2 3p6. To write the condensed configuration for bromine ion (Br-), we start with the noble gas core configuration of argon and then add the extra electron that the ion gained. Since bromine gains one electron to become Br-, we add one additional electron to the configuration: [Ne] 3s2 3p6 4s2 3d10 4p6.
Therefore, the condensed (noble gas core) configuration for bromine ion (Br-) is [Ne] 3s2 3p6 4s2 3d10 4p6.
3. Gallium ion (Ga3+):
Gallium has an atomic number of 31. It is in the fourth period of the periodic table. The noble gas just before gallium is argon (Ar), which has an electron configuration of [Ne] 3s2 3p6. To write the condensed configuration for gallium ion (Ga3+), we start with the noble gas core configuration of argon and then remove three electrons from the outermost shell of gallium. Since gallium loses three electrons to become Ga3+, we remove three electrons from the configuration: [Ne] 3s2 3p6.
Therefore, the condensed (noble gas core) configuration for gallium ion (Ga3+) is [Ne] 3s2 3p6.