It is an anion.
It tells when an atom is in a bonded pair that it holds the shared pair of electrons closer
Electron
It is more likely to attract electrons. :)
they work because in every atom there is a neutron, electron and proton. the electron will tell you what the atomic number is and the neutrons and protons will tell you what element it is.
Quantum numbers provide information about the energy, position, and spin of an electron in an atom. They help us understand the arrangement of electrons in different orbitals and predict their behavior within the atom.
You tell me
The oxidation number of an atom indicates the number of electrons it has gained, lost, or shared to reach a stable configuration. It provides information on an atom's electron distribution and helps predict its reactivity in chemical reactions.
Such atom attracts electrons pair more powerfully as compare to other covalently bounded atom and acquires a partially negative charge.
No, it is not. Almost all of the mass of an atom is located in the nucleus. The proton, that carrier of the positive electrical charge, is some 1836 times more massive that the negatively charged electron that it attracts to "build" an atom. If we take a look, we'll find that in a simple hydrogen-1 atom, a single proton is in the nucleus and a lone electron makes up the electron cloud. And the nucleus is about 1836 times more massive than the "rest" of the atom. In a helium-4 atom, two protons and two neutrons form the nucleus and a pair of electrons form the electron cloud. In this case, the nucleus is about 7,444 times as massive as the electrons. As we move up the periodic table, the figure gets even more lopsided.
when something is in the ground^No. That is totally incorrect.Basically, a ground state electron is when the atom/element is not being surged through with heat or electricity. Basically, it's the atom's normal electron configuration. So NA [Sodium]'s ground state would be shown as : 1s2, 2s2, 2p6, 3s1.The opposite is when it's in it's excited state. You can remember tell when an atom is in it's excited state when in the electron configuration, there is a huge jump, like 1s2,2s2,2p5, 3s2. This might have happened due to being exposed to heat and or electricity.In other words, ground state=normal, excited is, well, excited. XD
Valence refers to the number of electrons an atom can either gain, lose, or share in order to achieve a stable electron configuration. It helps determine how an atom can combine with other atoms to form chemical bonds.
For metals high electronegativity mean low reactivity; for halogens, C, O, N, S, etc. the meaning is high reactivity.