What element has an electron configuration of 1s 2 2s 2 2p 5?
fluorine
How do you figure out the electron configuration?
To calculate an electron configuration, divide the periodic table into sections to represent the atomic orbitals, the regions where electrons are contained. Groups one and two are the s-block, three through 12 represent the d-block, 13 to 18 are the p-block and the two rows at the bottom are the f-block.
How do you write electron configuration examples?
The symbols used for writing the electron configuration start with the shell number (n) followed by the type of orbital and finally the superscript indicates how many electrons are in the orbital. For example: Looking at the periodic table, you can see that Oxygen has 8 electrons.
How do you write SPDF configuration?
(sorbitals will stay with the element but the sublevels for that principal energy level will restart at s (e.g. Helium has 1s2, Lithium has 1s2 2s1, Magnesium has 1s2 2s2 2p6 3s2)
What are the three techniques in writing electron configuration?
Three methods are used to write electron configurations: orbital diagrams. spdf notation. noble gas notation.
What is the electron configuration of 2 4?
List of Electron Configurations of Elements 7
| NUMBER | ELEMENT | ELECTRON CONFIGURATION |
|---|---|---|
| 2 | Helium | 1s2 |
| 3 | Lithium | [He]2s1 |
| 4 | Beryllium | [He]2s2 |
| 5 | Boron | [He]2s22p1 |
What element has the electron configuration of 2 3?
Boron
Which element has the electron configuration 2 2?
Magnesium has the electronic configuration 2,8,2. Was this answer helpful?
How many electrons are in the first shell?
two electrons
Why are there 2 electrons in the first shell?
This first shell has only one subshell (labeled 1s) and can hold a maximum of 2 electrons. This is why there are two elements in the first row of the periodic table (H & He). Because the first shell can only hold a maximum of 2 electrons, the third electron must go into the second shell.