3d
The element Calcium (Ca) has 20 electrons according to its atomic number which is 20.
The element that has a single electron in the 2p sublevel is boron. The electron configuration of Boron is 1s22s22p1.
The electron configuration of the element with the atomic number 39 (yttrium) is: [Kr]4d15s2.
Phosphorus
3d
The element Calcium (Ca) has 20 electrons according to its atomic number which is 20.
it is about the atomic number. Calcium is the element.
An electron is not an element.
Helium has no electron affinity.
The element that has a single electron in the 2p sublevel is boron. The electron configuration of Boron is 1s22s22p1.
The electron is not a chemical element: it is a small elementary particle with a negative electrical charge.
The electron configuration of the element with the atomic number 39 (yttrium) is: [Kr]4d15s2.
The element with 1 electron in period 1 would be hydrogen.
Phosphorus
The element with that electron configuration is Iron.
You don't. Calcium is not an electron, calcium is a element