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प्रश्न
How many atoms of each kind are present in the following molecule:
Calcium oxide
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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
What type of bond is formed between two atoms, when the electronegative difference between them is zero?
Separate the following compounds into three categories - ionic, polar and covalent compounds; N2, NH4Cl, NH3, NO, NH4NO3, NCl3.
Five atoms are labeled A to E
|
Atoms |
Mass No |
Atomic No. |
|
A |
40 |
20 |
|
B |
19 |
9 |
|
C |
7 |
3 |
|
D |
16 |
8 |
|
E |
14 |
7 |
(a) Which one of these atoms:
(i) contains 7 protons
(ii) has electronic configuration 2,7
(b) Write down the formula in the compound formed between C and D
(c) Predict : (i) metals (ii) non-metals
Name the following:
An element having valency 'zero'
Write down the electronic configuration of
(i) chlorine atom (ii) chlorine ion
Give the orbital diagram of the following:
Hydrogen chloride
Element M forms a chloride with the formula MCl2 which is solid with a high melting point. What type of bond is in MCl2. Write the formula of the compound when M combines with sulphur, oxygen, and nitrogen.
Identify the following reaction as either oxidation or reduction:
Fe3+ + e- → Fe2+
How do atoms attain Noble gas electronic configuration?
How many atoms of each kind are present in the following molecule:
water
