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प्रश्न
Write the names of the elements present in the following compound.
Common salt
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उत्तर
Sodium chloride
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संबंधित प्रश्न
Write the names of `"Ca"("NO"_3)_2` compounds :
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Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
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Fill in the blank
A charged particle is called an _____
What are the building blocks of matter ?
What value has been given to the mass of this reference atom ?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Is it possible to see atoms these days ? Explain your answer.
What is an atom ? How do atoms usually exist ?
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(a) What is its atomic number?
(b) What is its mass number?
(c) Write the electronic configuration of the element E.
(d) State whether element E is a metal or non-metal. Why?
(e) What type of ion, cation or anion, will be formed by an atom of element E? Why
(f) Write the symbol of the ion formed by an atom of element E.
(g) What could element X be?
Draw the electron dot structure of this compound.
State the meaning of the term – (a) atom, (b) molecule, (c) radical – with a suitable example.
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K: Potassium:: C: ______.
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
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(i) Law of conservation of mass
(ii) Law of constant composition
(iii) Law of radioactivity
(iv) Law of multiple proportions
Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges.
Statement II: Atoms of each element are stable and emit their characteristic spectrum.
In the light of the above statements, choose the most appropriate answer from the options given below:
