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BidishaKashayap1333
@bidishakashayap1333
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Joined: Oct 11, 2021
Last seen: Jul 27, 2023
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Topics: 2174 / Replies: 0
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Topic
What is meant by atomicity? Explain with two examples.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 192
Topic
Name the elements represented by the following symbols: Hg, Pb, Au, Ag, Sn
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 74
Topic
State the chemical symbols for the following elements: Sodium, Potassium, Iron, Copper, Mercury, Silver
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 97
Topic
Give the names and symbols of five familiar substances which you think are elements.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 263
Topic
Give two symbols which have been derived from the ‘English names’ of the elements. (b) Give two symbols which have been derived from the ‘Latin names’ of the elements.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 195
Topic
What is meant by the symbol of an element? Explain with examples.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 266
Topic
Is it possible to see atoms these days? Explain your answer.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 67
Topic
Dalton’s atomic theory says that atoms are indivisible. Is this statement still valid? Give reasons for your answer.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 123
Topic
Give one major drawback of Dalton’s atomic theory of matter.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 60
Topic
Name the element used as a standard for atomic mass scale. (b) Which particular atom of the above element is used for this purpose?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 120
Topic
In water, the proportion of oxygen and hydrogen is _____ by mass. (b) In a chemical reaction, the sum of the masses of the reactants and the products remain unchanged.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 71
Topic
What is meant by saying that ‘the molecular mass of oxygen is 32’?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 69
Topic
Define ‘molecular mass’ of a substance.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 63
Topic
State whether the following statement is true or false: The symbol of element cobalt is CO.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 105
Topic
Why is it not possible to see an atom even with the most powerful microscope?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 265
Topic
The radius of an oxygen atom is 0.073 nm. What does the symbol ‘nm’ represent?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 137
Topic
Write the relation between nanometer and meter.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 237
Topic
Name the unit in which the radius of an atom is usually expressed.
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 222
Topic
How is the size of an atom indicated?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 264
Topic
What are the building blocks of matter?
3 years ago
Forum
Atoms and Molecules
Replies: 0
Views: 137
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