- 1(current)
Q. No.Symbols and can be written,
whereas symbols and are not acceptable because:
| 1. | The general convention for representing an element along with its atomic number (A) and atomic mass (Z) is |
| 2. | The general convention for representing an element along with its atomic mass (A) and atomic number (Z) is |
| 3. | The general convention for representing an element along with its wavelength (A) and frequency (Z) is |
| 4. | The general convention for representing an element along with its isotopes (A) and atomic number (Z) is |
The diameter of a zinc atom is 2.6 Å. If zinc atoms are arranged side by side lengthwise, number of atoms present in a length of 1.6 cm would be:
1. 5.153 × 107
2. 6.153 × 107
3. 4.153 × 109
4. 6.153 × 103
2 × 108 atoms of carbon are arranged side by side. The radius of a carbon atom if the length of this arrangement is 2.4 cm would be :
1. 7.0 × 10–11 m
2. 5.0 × 10–11 m
3. 8.0 × 10–11 m
4. 6.0 × 10–11 m
The wave number of a light whose time period is 2.0 × 10–10 s would be:
1. 16.66 m–1
2. 1.66 m–1
3. 32.34 m–1
4. 12.34 m–1
In Rutherford's \(\alpha\)-particle scattering experiment, a thin foil of heavy metals like gold or platinum is typically used. If a lighter metal foil, such as aluminum, were used instead, how would the observed deflection patterns change?
1. The same results will be observed
2. More deflection would be observed
3. There will not be enough deflection
4. None of the above
The incorrect statement regarding the characteristics of X-rays is :
1. The radiation can ionize the gas
2. It causes a fluorescence effect on ZnS
3. It is deflected by electric and magnetic fields
4. Have a shorter wavelength than ultraviolet rays
The number of protons, neutrons and electrons in \( _{71}^{175}Lu\) respectively, are:
1. 104, 71 and 71
2. 71, 71 and 104
3. 175, 104 and 71
4. 71, 104 and 71
- 1(current)
Q. No.
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