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प्रश्न
How are X-rays produced?
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उत्तर
When a beam of cathode rays is made to fall upon hard metallic targets like tungsten, X-rays are produced.
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संबंधित प्रश्न
What type of bond is formed between two atoms, when the electronegative difference between them is zero?
Fill in the blank.
___________ single covalent bonds are formed between the carbon and chlorine atoms.
Explain fractional atomic mass. What is the fractional mass of chlorine?
Complete the following table relating to the atomic structure of some elements.
|
Element Symbol |
Atomic Number |
Mass Number |
Numbers of neutrons |
Number of Electrons |
Number of Protons |
|
Li |
3 |
6 |
|
|
|
|
Cl |
17 |
|
20 |
|
|
|
Na |
|
|
12 |
|
11 |
|
Al |
|
27 |
|
|
13 |
|
S |
|
32 |
16 |
|
|
How do atoms attain noble gas configurations?
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of oxidizing agent.
State the type of bonding in the following molecules.
Water,
State the type of bonding in the following molecules.
Calcium oxide
In the formation of magnesium chloride (by direct combination between magnesium and chlorine), name the substance that is oxidized and the substance that is reduced.
How many atoms of each kind are present in the following molecule:
water
