Advertisements
Advertisements
Question
Explain the term – molecules. Give three examples of atoms of the same element forming a molecule. State the atomicity of the same.
Advertisements
Solution
Atoms of the same element or different elements combine to form a molecule.
Atoms of the same element forming a molecule
1. Oxygen
2. Nitrogen
3. Hydrogen.

Atomicity is the number of atoms present in one molecule of the element.
| Element | Molecule | Atomicity |
| Hydrogen H | H2 | 2 |
| Nitrogen N | N2 | 2 |
| Oxygen O | O2 | 2 |
RELATED QUESTIONS
Write down the name of a compound represented by the following formula:
K2SO4
Write down the name of a compound represented by the following formula:
CaCl2
Write down the name of a compound represented by the following formula:
KNO3
Write down the name of a compound represented by the following formula:
CaCO3
Calculate the number of molecules of sulphur (S8) present in 16 g of solid sulphur.
Define: Atomic weight :
What is meant by atomicity ? Explain with two examples.
Write the formulae of the following compounds. Also name the elements present in them.
- Water
- Ammonia
- Methane
- Sulphur dioxide
- Ethanol
What is the difference between the molecule of an element and the molecule of a compound? Give one example of each.
Molecular compounds are usually formed by the combination between :
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.
Why are the symbols and formulae of substances important?
State the main points of the contradiction of Dalton’s atomic theory by the Modern Atomic Theory.
State the atomicity of the following:
Neon
The Atomicity of phosphorous is ______
Define: Atomicity.
Derive the relationship between Relative molecular mass and Vapour density.
Which of the following contains maximum number of molecules?
