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प्रश्न
Two elements sometimes can form more than one compound.
विकल्प
True
False
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उत्तर
True
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संबंधित प्रश्न
Write down the name of a compound represented by the following formula:
Al2(SO4)3
Give the name of the element present in the following compound:
Quick lime
State the term.
The number of atoms present in a molecule of an element _________
Define: Atomic number
Define: Atomic number
Define: Mass number :
Define: Atomic weight :
What is meant by atomicity ? Explain with two examples.
What is the atomicity of the following ?
- Oxygen
- Ozone
- Neon
- Sulphur
- Phosphorus
- Sodium
In what form does oxygen gas occur in nature ?
An element A forms an oxide A2O5.
What is the valency of element A ?
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.
State the main points of the contradiction of Dalton’s atomic theory by the Modern Atomic Theory.
Give a reason why –
Ozone is considered triatomic, but phosphorus a tetratomic molecule.
State the atomicity of the following:
Neon
State the atomicity of the following:
Oxygen
State the atomicity of the following:
Argon
Which of the following is a short and scientific way of representing one molecule of an element or compound?
State true of false. If false, give the correct statement.
NaCl represents one molecule of sodium chloride.
Classify the following molecules as the molecules of element or compound
| 1. |  |
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| 2. |  |
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| 3. |  |
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| 4. |  |
Which of the following is a triatomic molecule?
If a molecule is made of similar kinds of atoms, then it is called ______ atomic molecule.
The Atomicity of phosphorous is ______
Give any two examples for heterodiatomic molecules.
Which of the following contains maximum number of molecules?
