Long-hand version: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 Short-hand version: [Ar] 4s^2 Note: The "^" symbol means the the following number is in the form of a superscript.
20Ca2: 1s2 2s2 2p6 3s2 3p5 3d1
maybe 20Ca2: 1s2 2s2 2p6 3s2 3p5 3d1
Calcium has the atomic number 20 and is part of Group II. This means that the electron configuration is [Ar] 4s2.
The electron configuration of the cation Ca2+ is 1s22s22p63s23p6.
Any element has electrons equivalent to the atomic number of the element. So 20 electrons in 20Ca.
The electronic configuration of the element with atomic number 20 (calcium) is [Ar]4s2.
The electronic configuration of the element with atomic number 20 (calcium) is [Ar]4s2.
2 8 8
[Ar]
1s2 2s2 2p63s23p64s2
The electronic configuration for aluminum is 1s22s22p63s23p1 .
The atomic number of zinc is 30. Its abbreviated electron configuration is [Ar]4s23d10 The full electron configuration is 1s22s22p63s23p64s23d10 (configurations for the atom in its ground state. Ions and excited atoms have different configurations).
[Ar]4s23d2
[Ne]3s2 3p2
1s2 2s2 2p63s23p64s2
Li, Be, O: the first term in the abridged electron configuration is [He]. Ca, K: the first term in the abridged electron configuration is [Ar].
The correct electron configuration of indium (In) is [Kr]4d105s25p1. Refer to the related links for a printable Periodic Table with electron configurations.
Normal Ca atom electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2Ca+ (last electron is gone from the s orbital): 1s2 2s2 2p6 3s2 3p6 4s1
The electronic configuration for aluminum is 1s22s22p63s23p1 .
Calcium loses two electrons to obtain a noble-gas electron configuration.
[Xe]6s25d1
The atomic number of zinc is 30. Its abbreviated electron configuration is [Ar]4s23d10 The full electron configuration is 1s22s22p63s23p64s23d10 (configurations for the atom in its ground state. Ions and excited atoms have different configurations).
[Ar]4s23d2
[Ne]3s2 3p2
No Such ... all atoms have an electron configuration, yet Ca++ is not a noble gas.
[Xe]6s25d1 is the electron configuration of lanthanum.