The atomic number of an element variable valency.

A natural atom of an element has 2K,8L, 9M and 2N electrons .The atomic number of element is : The valency of element is

The atomic number of an element which shows a valency of +3 is

The atomic number of an element is 15. Hence, it will show a valency of

The atomic number of an element is 16. Predict the number of valence electrons in its atom

The atomic number of an element is 16. Predict its valency

The atomic number of an element X is 16. (b) What will be the valency of X ?

The atomic number of an element X is 8 and that of element Y is 4. Both these elements can exhibit a valency of :

The atomic number of an element X is 8 and that of element Y is 4. Both these elements can exhibit a valency of :

The element Cu with atomic number 29 undergoes chemcial reaction to formation with oxidation number +2: Can this element show variable valency? Why?