Advertisements
Advertisements
प्रश्न
An element A forms an oxide A2O5.
What is the valency of element A ?
Advertisements
उत्तर
Element A forms an oxide A2O5. Crossing the valencies, we can see that the valency of O (oxide) is −2 and that of element A is 5.
APPEARS IN
संबंधित प्रश्न
State the term.
The number of atoms present in a molecule of an element _________
Define: Atomic number
Define: Atomic weight :
In what form does oxygen gas occur in nature ?
What are (i) ionic compounds, and (ii) molecular compounds ? Give two examples of each type of compounds.
Why are the symbols and formulae of substances important?
Give a reason why –
Ozone is considered triatomic, but phosphorus a tetratomic molecule.
Which of the following is a short and scientific way of representing one molecule of an element or compound?
Which of the following is a triatomic molecule?
Give any two examples for heterodiatomic molecules.
