because it has equal numbers of protons and electrons
Copper (Cu) as an element does not have any charge. As an ion (cation) it will have a positive charge.
1s2 , 2s2, 2p6, 3s2,3p6, 3d10,4s1
positive
The ground-state electron configuration for a neutral atom of manganese is: 1s22s22p63s23p63d54s2 or [Ar]3d54s2
Calcium has the electron configuration [Ar]4s2; the neutral atom of calcium has 20 electrons.
A neutral sodium must lose one electron in order for the resulting sodium ion to have the same electron configuration as an atom of the element neon.
Let us assume that we have Sodium (Na), it has the ground state electron configuration of: [Ne]3S1. The ANION is negative, and thereby has more electrons, the Na anion(Na.) would have the following electron configuration: [Ne]3S2. The CATION(which is a positive ion) of Na(Na+) would have [Ne] as it electron configuration(as it loses an electron and becomes "equal" to Neon)
ns2np5
The electron configuration for neutral Chlorine is 2.8.6.
It is the electron configuration of a neutral, not excited atom.
The ground-state electron configuration for a neutral atom of manganese is: 1s22s22p63s23p63d54s2 or [Ar]3d54s2
Calcium has the electron configuration [Ar]4s2; the neutral atom of calcium has 20 electrons.
13Al = 1s2,2s2,2p6,3s2,3p1
1s2,2s2,2p6,3s2,3p3
A neutral sodium must lose one electron in order for the resulting sodium ion to have the same electron configuration as an atom of the element neon.
Electron configuration of uranium: [Rn]5f36d17s2
When an electron is acquired by a neutral atom, the energy change is called electron affinity. Neutral atoms with an s2p6 electron configuration in the highest energy level are best classified as gases.
The electron configuration of beryllium is written as [He] 2s2. This means that it has 2s2 electrons above the configuration of Helium.
ns2np5
[Ar] 4s2 3d7