Calcium. To get the answer easily, count up the electrons, then look for that atomic number on the Periodic Table
Lithium (Li) has the electron configuration 1s2 2s1.
Helium has the electron configuration 1s2
The electron configuration is the number of electrons in each energy level of an element. The electron configuration of Li is, 1s2 2s1. The electron configuration of F is, 1s2 2s2 2p5.
1s2 2s2 2p6 3s2 3p3 is the electron configuration of element 15.
1s2 2s2 2p2
Lithium (Li) has the electron configuration 1s2 2s1.
Helium has the electron configuration 1s2
The electron configuration is the number of electrons in each energy level of an element. The electron configuration of Li is, 1s2 2s1. The electron configuration of F is, 1s2 2s2 2p5.
1s2 2s2 2p6 3s2 3p3 is the electron configuration of element 15.
1s2 2s2 2p2
Magnesium
Phosphorus has the above electron configuration. It has 15 electrons and protons.
Argon
Argon
This chemical element is neon (Ne).
That is the element phosphorous
3d11 is not possible, The element with the electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p4 is Selenium (Se).