explain the term valency and variable valency
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However, in transition elements, an atom loses electrons from the shell next to the valence shell (penultimate shell). In such a situation the element exhibits more than one valency(variable valency). For example: Iron has 2 electrons in its valence shell. On donating these electrons, its valency is 2+.
priyanshugawri61:
and what is valency
Valency is the number of electrons at its outermost shell or its atomic charge, some elements have several charge like sulfur it has -2, +4, +6 And nitrogen +5 , -3 . the negative charge means the elements wants how many more electrons to fill its shell like nitrogen it has -3 so it still needs 3 electrons. The positive charge means how many electrons it wants to lose like sodium it has a charge of +1 so it wants to loses i electrons.
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when atom loses electrons from its shell which is next to the valence shell is called variable valency .
the number of electrons lost or gained by an atom is termed as valency .
if an atom loses electron then it will be positive valency and an atom gains in electronic then it is negative valency
the number of electrons lost or gained by an atom is termed as valency .
if an atom loses electron then it will be positive valency and an atom gains in electronic then it is negative valency
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