| 1 |
What will be the relative atomic mass of nitrogen given the abundance of its two isotopes, 14 N and 15 N are 99.64 and 0.35 |
14.0210
14.2100
14.0021
14.1200
|
| 2 |
In which isotope of oxygen there are the equal numbr of protons electons and neutorns. |
O<sup>16</sup>
<sup>17</sup>O
<sup>18</sup>O
None of these
|
| 3 |
Which particle is present in differente number in the isotopes. |
Proton
Electron
Neutron
Both neutron and electron
|
| 4 |
Why has isotopes not been shown int he periodic table. |
Isotopes do not show periodic behavior
Periodic tble cannot accomodate a large number of isotopes of different elements
All the isotops have same atomic number so there is no need to give them separate places
Someof the isotopes are unstble and they give rise to different elements.
|
| 5 |
What information was obtained fom discharge tube expriments? |
Electrons and protons were discovered
Structur eof atom was discovered
Neutrons and protons were discovered
Presence of nucleus in an atom was discovered
|
| 6 |
How many electrons can be accommodated at the msot in the third shell of the elements. |
8
12
10
18
|
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