Valency of an Ion
Valency of an Ion
Valency of an Ion: Valence electrons are the electrons contained in the outermost or valence shell of an atom or ion. The valency of an ion is defined as the number of units of positive or negative charges present on the ion.
For example, the valencies of ions are 1, 2 and 2 respectively.
Ion with postive charge are known as cations. Eg: etc. The valency in these ions are 1,2,3 respectively.
Ions with negative charge are known as anions. Eg: etc. Here, valences are 1 and 2 respectively.
Which of the following are correct : (a) Na+ is a cation. (b) Cl- is a cation. (c) O2- is a anion. (d) He is a cation. | |||
| Right Option : D | |||
| View Explanation | |||
What is the valency of Cl-? | |||
| Right Option : A | |||
| View Explanation | |||
True/False (a) Cations are the negatively charged ions. (b) Na+ and Cl-,both ions have 1 valency. (c) Na+ and Ca2+,both ions have 2 valency. (d) Anions are the negatively charged ions. | |||
| Right Option : C | |||
| View Explanation | |||
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