356539
\(\alpha - \) particles have I. mass equals to that of helium atom II. Charge of \( + 2e\) units III. Size less than \({10^{ - 2}}m\) IV. Speed equal to that of speed of light Choose the correct option from the codes given below.
1 I and II
2 II and III
3 I, II and III
4 I, II and IV
Explanation:
Option (1) is correct.
PHXII12:ATOMS
356540
In Millikan's oil drop experiment, the charge on oil drop is calculated to \({6.35 \times 10^{-19} {C}}\). The number of excess electrons on the drop is
1 3.9
2 4.2
3 4
4 6
Explanation:
Total charge, \({Q=6.35 \times 10^{-19} {C}}\) \({\because \quad Q=n e \quad(n=}\) number of electrons) \(\therefore n = \frac{Q}{e} = \frac{{6.35 \times {{10}^{ - 19}}}}{{1.6 \times {{10}^{ - 19}}}} \simeq 4\) ( \({\because}\) we can not take number of electrons in decimal.) So correct option is (3).
PHXII12:ATOMS
356541
Assertion : Isotope of an element can be separated by using a mass spectrometer. Reason : Separation of isotope is possible because of the difference in electron numbers of isotope.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
The atomic number, which corresponds to the number of electrons or protons, remains the same in isotopes of an element. Two circles are shown. Their radii \(r_{1}\) and \(r_{2}\) are different due to different values of \((Q / M) \text { in formula } r=(M v / Q B)\) Isotopes of an element can be differentiated based on their distinct atomic weights using a mass spectrograph. So correct option is (3).
356539
\(\alpha - \) particles have I. mass equals to that of helium atom II. Charge of \( + 2e\) units III. Size less than \({10^{ - 2}}m\) IV. Speed equal to that of speed of light Choose the correct option from the codes given below.
1 I and II
2 II and III
3 I, II and III
4 I, II and IV
Explanation:
Option (1) is correct.
PHXII12:ATOMS
356540
In Millikan's oil drop experiment, the charge on oil drop is calculated to \({6.35 \times 10^{-19} {C}}\). The number of excess electrons on the drop is
1 3.9
2 4.2
3 4
4 6
Explanation:
Total charge, \({Q=6.35 \times 10^{-19} {C}}\) \({\because \quad Q=n e \quad(n=}\) number of electrons) \(\therefore n = \frac{Q}{e} = \frac{{6.35 \times {{10}^{ - 19}}}}{{1.6 \times {{10}^{ - 19}}}} \simeq 4\) ( \({\because}\) we can not take number of electrons in decimal.) So correct option is (3).
PHXII12:ATOMS
356541
Assertion : Isotope of an element can be separated by using a mass spectrometer. Reason : Separation of isotope is possible because of the difference in electron numbers of isotope.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
The atomic number, which corresponds to the number of electrons or protons, remains the same in isotopes of an element. Two circles are shown. Their radii \(r_{1}\) and \(r_{2}\) are different due to different values of \((Q / M) \text { in formula } r=(M v / Q B)\) Isotopes of an element can be differentiated based on their distinct atomic weights using a mass spectrograph. So correct option is (3).
356539
\(\alpha - \) particles have I. mass equals to that of helium atom II. Charge of \( + 2e\) units III. Size less than \({10^{ - 2}}m\) IV. Speed equal to that of speed of light Choose the correct option from the codes given below.
1 I and II
2 II and III
3 I, II and III
4 I, II and IV
Explanation:
Option (1) is correct.
PHXII12:ATOMS
356540
In Millikan's oil drop experiment, the charge on oil drop is calculated to \({6.35 \times 10^{-19} {C}}\). The number of excess electrons on the drop is
1 3.9
2 4.2
3 4
4 6
Explanation:
Total charge, \({Q=6.35 \times 10^{-19} {C}}\) \({\because \quad Q=n e \quad(n=}\) number of electrons) \(\therefore n = \frac{Q}{e} = \frac{{6.35 \times {{10}^{ - 19}}}}{{1.6 \times {{10}^{ - 19}}}} \simeq 4\) ( \({\because}\) we can not take number of electrons in decimal.) So correct option is (3).
PHXII12:ATOMS
356541
Assertion : Isotope of an element can be separated by using a mass spectrometer. Reason : Separation of isotope is possible because of the difference in electron numbers of isotope.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
The atomic number, which corresponds to the number of electrons or protons, remains the same in isotopes of an element. Two circles are shown. Their radii \(r_{1}\) and \(r_{2}\) are different due to different values of \((Q / M) \text { in formula } r=(M v / Q B)\) Isotopes of an element can be differentiated based on their distinct atomic weights using a mass spectrograph. So correct option is (3).
