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प्रश्न
How many atoms of each kind are present in the following molecule:
Calcium oxide
उत्तर
Calcium oxide (CaO) has one atom of calcium and one atom of oxygen. The calcium atom valence shell has two electrons. As a result, it contributes two electrons to complete the octet, while oxygen requires two electrons to complete the outermost shell.
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संबंधित प्रश्न
(i) How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
(ii) How many electrons are required for their octet structure?
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2, 8, 1 |
2, 8, 7 |
2, 5 |
1 |
Answer the following question based on the table above:
What is the formula of the compound formed between W and X.
State the following is a reduction reaction or oxidation reaction.
\[\ce{Pb -> Pb^2+ + 2e-}\]
State the following is a reduction reaction or oxidation reaction.
\[\ce{Cu -> Cu^2+}\]
Why do `""_17^35"CI"` and `""_17^37"CI"` have the same chemical properties? In what respect do these atoms differ?
Name the following:
The shell closest to the nucleus of an atom
Give a reason
Physical properties of isotopes are different.
______ is the only noble gas that does not have eight electrons in its valence shell.
How many atoms of each kind are present in the following molecule:
carbon tetrachloride
How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?
