valency ion table some examples
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Na+ ana CL-
are some examples
valency ion table some examples
What is valency with an example?
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Valency is the combining capacity of an Element. It is the number of electrons an atom of an element can gain,lose or share. The valency of an atom is equal to thevalence electrons, if it is 4 or less. If it is more than 4, the valency is equal to 8 minus the number of electrons in the outer shell
It is the number of electrons an atom of an element can gain,lose or share. The valency of an atom is equal to the valence electrons, if it is 4 or less. If it is more than 4, the valency is equal to 8 minus the number of electrons in the outer shell. Example: Magnesium has electronic configuration 2,8,2.
Thus number of electrons an atom gets from or loses to other atoms so as to have 8 electrons in their last shell is called valency. The atoms from where it gets or gives away its electrons get bonded with that atom.
The valency of an element is the number of hydrogen atoms that can combine with or replace (either directly or indirectly) one atom of the element. In other words, the valency of an element is the number of electrons an atom of the element uses to combine with atoms of other elements - it is the combining power of an atom of the element. In an atom, the valence electrons are the electrons that can be used in combining with other atoms - these are the electrons in the orbitals of the outermost shell (also called valence shell).
Notice that it is not in all cases that the valency of an atom equals the total number of its valence electrons. For example, oxygen has six valence electrons, but its valency is 2. Some elements may have more than one combining power (or valency), while others have just one.
For example, H →1; Mg→2; Al→3; C→4; N→3, and 5; P→3 and 5; O→2; S→ 2, 4 and 6; Cl→ 1; and Ne→0.
The valencies of radicals are same as the number of charge they carry.
For example, NH4+ →1; OH- → 1 ; and SO42- → 2.