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
Give the name of the element present in the following compound:
Potassium sulphate
Define: Atomic number
What is the atomicity of the following ?
- Oxygen
- Ozone
- Neon
- Sulphur
- Phosphorus
- Sodium
What are (i) ionic compounds, and (ii) molecular compounds ? Give two examples of each type of compounds.
An element X forms the following compounds with hydrogen, carbon and oxygen :
H2X, CX2, XO2, XO3
State the three valencies of element X which are illustrated by these compounds.
Calculate the mass of 3.011 × 1024 atoms of carbon.
Correct the following statement:
A molecule of sulphur is monoatomic.
Give one example of a triatomic molecule
State the atomicity of the following:
Chlorine
Write any two classifications of a molecule.
