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प्रश्न
An atom X with atomic number 20 combines with atom Y with atomic number 8. Draw the dot structure for the formation of the molecule XY.
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उत्तर
Atom X is Calcium with atomic number 20 and atom Y is Oxygen with atomic number 8.
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संबंधित प्रश्न
Fill in the blank.
___________ single covalent bonds are formed between the carbon and chlorine atoms.
What do you understand by redox reactions? Explain oxidation and reduction in terms of loss or gain of electrons.
Name an element which does not contain neutron.
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
Explain fractional atomic mass. What is the fractional mass of chlorine?
Name the following:
Two atoms having the same number of protons and electrons but different number of neutrons.
Name the following:
The shell closest to the nucleus of an atom
Give reason
Argon does not react.
State the type of bonding in the following molecules.
Water,
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a metal.
