307093
One isotope of a non-metallic element (X) has mass number 127 and 74 neutrons in the nucleus. The anion derived from the isotope has 54 electrons is
Number of protons \({\rm{ = }}\) Mass number \({\rm{ - }}\) Number of neutrons \({\rm{ = 127 - 74 = 53}}\) Number of electrons \({\rm{ = 54}}\) (Anion of isotopes carries one negative charge) So, the symbol is \({}_{{\rm{53}}}^{{\rm{127}}}{{\rm{X}}^{\rm{ - }}}\)
CHXI02:STRUCTURE OF ATOM
307096
Nitrogen atom has atomic number 7 & oxygen has atomic number 8. The total number of electrons in nitrate ion is
1 \({\rm{31}}\)
2 \(30\)
3 \(15\)
4 \(32\)
Explanation:
Number of electron in \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}{\rm{ = }}\) (Electrons in N)\({\rm{ + }}\)(\({\rm{3}} \times \) electrons in O) [(+1 due to negative charge)] \({\rm{ = 7 + 3 \times 8 + 1 = 32}}\)
CHXI02:STRUCTURE OF ATOM
307106
Read Assertion and Reason carefully and mark correct option. Assertion : Loss of electron from hydrogen atom results in nucleus of \(\sim 1.5 \times 10^{-3} \mathrm{pm}\) size. Reason : Proton \(\left(\mathrm{H}^{+}\right)\)always exists in combined form.
1 Assertion is incorrect but reason is correct.
2 Assertion is correct but Reason is incorrect.
3 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
4 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
Explanation:
Size of nucleus is of order \({\mathrm{1.5 \times 10^{-15} \mathrm{~m}}}\) (or) \({\mathrm{1.5 \times 10^{-3} \mathrm{pm}}}\) (After losing \({\mathrm{\mathrm{e}^{-}}}\), hydrogen atom contains only one proton in nucleus) \({\mathrm{\mathrm{H}^{+}}}\)always exists in combined form. There is no relation between these two statements. Thus, both assertion and reason are correct. But reason is not the correct explanation.
JEE - 2023
CHXI02:STRUCTURE OF ATOM
307107
In the Rutherford gold foil experiment, the fact that most of the \({\rm{\alpha - }}\) particles were not deflected as they passed through the gold foil indicates that
1 The nucleus is positively charged
2 The atom has mostly empty space
3 Atoms are solid spheres touching each other in the solid state
4 Gold is very dense element
Explanation:
Due to empty space in the atom.
CHXI02:STRUCTURE OF ATOM
307108
Deflection back of a few particles on hitting thin foil of gold shows that
1 nucleus is heavy
2 nucleus is small
3 Both (1) and (2)
4 electrons create hindrance in movement of \(\alpha\)-particles
Explanation:
Deflection back of a few particles on hitting thin foil of gold is due to more repulsive forces of positive charge which is concentrated in a very small and heavy volume called nucleus and \(\alpha\)-particles are also positively charged.
307093
One isotope of a non-metallic element (X) has mass number 127 and 74 neutrons in the nucleus. The anion derived from the isotope has 54 electrons is
Number of protons \({\rm{ = }}\) Mass number \({\rm{ - }}\) Number of neutrons \({\rm{ = 127 - 74 = 53}}\) Number of electrons \({\rm{ = 54}}\) (Anion of isotopes carries one negative charge) So, the symbol is \({}_{{\rm{53}}}^{{\rm{127}}}{{\rm{X}}^{\rm{ - }}}\)
CHXI02:STRUCTURE OF ATOM
307096
Nitrogen atom has atomic number 7 & oxygen has atomic number 8. The total number of electrons in nitrate ion is
1 \({\rm{31}}\)
2 \(30\)
3 \(15\)
4 \(32\)
Explanation:
Number of electron in \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}{\rm{ = }}\) (Electrons in N)\({\rm{ + }}\)(\({\rm{3}} \times \) electrons in O) [(+1 due to negative charge)] \({\rm{ = 7 + 3 \times 8 + 1 = 32}}\)
CHXI02:STRUCTURE OF ATOM
307106
Read Assertion and Reason carefully and mark correct option. Assertion : Loss of electron from hydrogen atom results in nucleus of \(\sim 1.5 \times 10^{-3} \mathrm{pm}\) size. Reason : Proton \(\left(\mathrm{H}^{+}\right)\)always exists in combined form.
1 Assertion is incorrect but reason is correct.
2 Assertion is correct but Reason is incorrect.
3 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
4 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
Explanation:
Size of nucleus is of order \({\mathrm{1.5 \times 10^{-15} \mathrm{~m}}}\) (or) \({\mathrm{1.5 \times 10^{-3} \mathrm{pm}}}\) (After losing \({\mathrm{\mathrm{e}^{-}}}\), hydrogen atom contains only one proton in nucleus) \({\mathrm{\mathrm{H}^{+}}}\)always exists in combined form. There is no relation between these two statements. Thus, both assertion and reason are correct. But reason is not the correct explanation.
JEE - 2023
CHXI02:STRUCTURE OF ATOM
307107
In the Rutherford gold foil experiment, the fact that most of the \({\rm{\alpha - }}\) particles were not deflected as they passed through the gold foil indicates that
1 The nucleus is positively charged
2 The atom has mostly empty space
3 Atoms are solid spheres touching each other in the solid state
4 Gold is very dense element
Explanation:
Due to empty space in the atom.
CHXI02:STRUCTURE OF ATOM
307108
Deflection back of a few particles on hitting thin foil of gold shows that
1 nucleus is heavy
2 nucleus is small
3 Both (1) and (2)
4 electrons create hindrance in movement of \(\alpha\)-particles
Explanation:
Deflection back of a few particles on hitting thin foil of gold is due to more repulsive forces of positive charge which is concentrated in a very small and heavy volume called nucleus and \(\alpha\)-particles are also positively charged.
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CHXI02:STRUCTURE OF ATOM
307093
One isotope of a non-metallic element (X) has mass number 127 and 74 neutrons in the nucleus. The anion derived from the isotope has 54 electrons is
Number of protons \({\rm{ = }}\) Mass number \({\rm{ - }}\) Number of neutrons \({\rm{ = 127 - 74 = 53}}\) Number of electrons \({\rm{ = 54}}\) (Anion of isotopes carries one negative charge) So, the symbol is \({}_{{\rm{53}}}^{{\rm{127}}}{{\rm{X}}^{\rm{ - }}}\)
CHXI02:STRUCTURE OF ATOM
307096
Nitrogen atom has atomic number 7 & oxygen has atomic number 8. The total number of electrons in nitrate ion is
1 \({\rm{31}}\)
2 \(30\)
3 \(15\)
4 \(32\)
Explanation:
Number of electron in \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}{\rm{ = }}\) (Electrons in N)\({\rm{ + }}\)(\({\rm{3}} \times \) electrons in O) [(+1 due to negative charge)] \({\rm{ = 7 + 3 \times 8 + 1 = 32}}\)
CHXI02:STRUCTURE OF ATOM
307106
Read Assertion and Reason carefully and mark correct option. Assertion : Loss of electron from hydrogen atom results in nucleus of \(\sim 1.5 \times 10^{-3} \mathrm{pm}\) size. Reason : Proton \(\left(\mathrm{H}^{+}\right)\)always exists in combined form.
1 Assertion is incorrect but reason is correct.
2 Assertion is correct but Reason is incorrect.
3 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
4 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
Explanation:
Size of nucleus is of order \({\mathrm{1.5 \times 10^{-15} \mathrm{~m}}}\) (or) \({\mathrm{1.5 \times 10^{-3} \mathrm{pm}}}\) (After losing \({\mathrm{\mathrm{e}^{-}}}\), hydrogen atom contains only one proton in nucleus) \({\mathrm{\mathrm{H}^{+}}}\)always exists in combined form. There is no relation between these two statements. Thus, both assertion and reason are correct. But reason is not the correct explanation.
JEE - 2023
CHXI02:STRUCTURE OF ATOM
307107
In the Rutherford gold foil experiment, the fact that most of the \({\rm{\alpha - }}\) particles were not deflected as they passed through the gold foil indicates that
1 The nucleus is positively charged
2 The atom has mostly empty space
3 Atoms are solid spheres touching each other in the solid state
4 Gold is very dense element
Explanation:
Due to empty space in the atom.
CHXI02:STRUCTURE OF ATOM
307108
Deflection back of a few particles on hitting thin foil of gold shows that
1 nucleus is heavy
2 nucleus is small
3 Both (1) and (2)
4 electrons create hindrance in movement of \(\alpha\)-particles
Explanation:
Deflection back of a few particles on hitting thin foil of gold is due to more repulsive forces of positive charge which is concentrated in a very small and heavy volume called nucleus and \(\alpha\)-particles are also positively charged.
307093
One isotope of a non-metallic element (X) has mass number 127 and 74 neutrons in the nucleus. The anion derived from the isotope has 54 electrons is
Number of protons \({\rm{ = }}\) Mass number \({\rm{ - }}\) Number of neutrons \({\rm{ = 127 - 74 = 53}}\) Number of electrons \({\rm{ = 54}}\) (Anion of isotopes carries one negative charge) So, the symbol is \({}_{{\rm{53}}}^{{\rm{127}}}{{\rm{X}}^{\rm{ - }}}\)
CHXI02:STRUCTURE OF ATOM
307096
Nitrogen atom has atomic number 7 & oxygen has atomic number 8. The total number of electrons in nitrate ion is
1 \({\rm{31}}\)
2 \(30\)
3 \(15\)
4 \(32\)
Explanation:
Number of electron in \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}{\rm{ = }}\) (Electrons in N)\({\rm{ + }}\)(\({\rm{3}} \times \) electrons in O) [(+1 due to negative charge)] \({\rm{ = 7 + 3 \times 8 + 1 = 32}}\)
CHXI02:STRUCTURE OF ATOM
307106
Read Assertion and Reason carefully and mark correct option. Assertion : Loss of electron from hydrogen atom results in nucleus of \(\sim 1.5 \times 10^{-3} \mathrm{pm}\) size. Reason : Proton \(\left(\mathrm{H}^{+}\right)\)always exists in combined form.
1 Assertion is incorrect but reason is correct.
2 Assertion is correct but Reason is incorrect.
3 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
4 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
Explanation:
Size of nucleus is of order \({\mathrm{1.5 \times 10^{-15} \mathrm{~m}}}\) (or) \({\mathrm{1.5 \times 10^{-3} \mathrm{pm}}}\) (After losing \({\mathrm{\mathrm{e}^{-}}}\), hydrogen atom contains only one proton in nucleus) \({\mathrm{\mathrm{H}^{+}}}\)always exists in combined form. There is no relation between these two statements. Thus, both assertion and reason are correct. But reason is not the correct explanation.
JEE - 2023
CHXI02:STRUCTURE OF ATOM
307107
In the Rutherford gold foil experiment, the fact that most of the \({\rm{\alpha - }}\) particles were not deflected as they passed through the gold foil indicates that
1 The nucleus is positively charged
2 The atom has mostly empty space
3 Atoms are solid spheres touching each other in the solid state
4 Gold is very dense element
Explanation:
Due to empty space in the atom.
CHXI02:STRUCTURE OF ATOM
307108
Deflection back of a few particles on hitting thin foil of gold shows that
1 nucleus is heavy
2 nucleus is small
3 Both (1) and (2)
4 electrons create hindrance in movement of \(\alpha\)-particles
Explanation:
Deflection back of a few particles on hitting thin foil of gold is due to more repulsive forces of positive charge which is concentrated in a very small and heavy volume called nucleus and \(\alpha\)-particles are also positively charged.
307093
One isotope of a non-metallic element (X) has mass number 127 and 74 neutrons in the nucleus. The anion derived from the isotope has 54 electrons is
Number of protons \({\rm{ = }}\) Mass number \({\rm{ - }}\) Number of neutrons \({\rm{ = 127 - 74 = 53}}\) Number of electrons \({\rm{ = 54}}\) (Anion of isotopes carries one negative charge) So, the symbol is \({}_{{\rm{53}}}^{{\rm{127}}}{{\rm{X}}^{\rm{ - }}}\)
CHXI02:STRUCTURE OF ATOM
307096
Nitrogen atom has atomic number 7 & oxygen has atomic number 8. The total number of electrons in nitrate ion is
1 \({\rm{31}}\)
2 \(30\)
3 \(15\)
4 \(32\)
Explanation:
Number of electron in \({\rm{N}}{{\rm{O}}_{\rm{3}}}^{\rm{ - }}{\rm{ = }}\) (Electrons in N)\({\rm{ + }}\)(\({\rm{3}} \times \) electrons in O) [(+1 due to negative charge)] \({\rm{ = 7 + 3 \times 8 + 1 = 32}}\)
CHXI02:STRUCTURE OF ATOM
307106
Read Assertion and Reason carefully and mark correct option. Assertion : Loss of electron from hydrogen atom results in nucleus of \(\sim 1.5 \times 10^{-3} \mathrm{pm}\) size. Reason : Proton \(\left(\mathrm{H}^{+}\right)\)always exists in combined form.
1 Assertion is incorrect but reason is correct.
2 Assertion is correct but Reason is incorrect.
3 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
4 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
Explanation:
Size of nucleus is of order \({\mathrm{1.5 \times 10^{-15} \mathrm{~m}}}\) (or) \({\mathrm{1.5 \times 10^{-3} \mathrm{pm}}}\) (After losing \({\mathrm{\mathrm{e}^{-}}}\), hydrogen atom contains only one proton in nucleus) \({\mathrm{\mathrm{H}^{+}}}\)always exists in combined form. There is no relation between these two statements. Thus, both assertion and reason are correct. But reason is not the correct explanation.
JEE - 2023
CHXI02:STRUCTURE OF ATOM
307107
In the Rutherford gold foil experiment, the fact that most of the \({\rm{\alpha - }}\) particles were not deflected as they passed through the gold foil indicates that
1 The nucleus is positively charged
2 The atom has mostly empty space
3 Atoms are solid spheres touching each other in the solid state
4 Gold is very dense element
Explanation:
Due to empty space in the atom.
CHXI02:STRUCTURE OF ATOM
307108
Deflection back of a few particles on hitting thin foil of gold shows that
1 nucleus is heavy
2 nucleus is small
3 Both (1) and (2)
4 electrons create hindrance in movement of \(\alpha\)-particles
Explanation:
Deflection back of a few particles on hitting thin foil of gold is due to more repulsive forces of positive charge which is concentrated in a very small and heavy volume called nucleus and \(\alpha\)-particles are also positively charged.