`""_(92)^(238)U` से पहले `alpha `-कण तथा फिर `beta^-`कण निकलता है। इसके क्रमागत विघटनों से बने नए नाभिकों की द्रव्यमान-संख्या (mass number) तथा परमाणु-क्रमांक (atomic number) बताएँ |

A number is first decreased by 10% and then increased by 10%. The number so obtained is 100 less than the original number. The original number is: किसी संख्या में पहले 10% की कमी तथा फिर 10% की वृद्धि की जाती है | इस प्रकार प्राप्त संख्या वास्तविक संख्या से 100 कम है | वास्तविक संख्या ज्ञात करें |

With reference to a number greater than one, the difference between itself and its reciprocal is 25% of the sum of itself and its reciprocal. By how much percentage (correct one decimal place) is the fourth power of the number greater than its square? एक से बड़ी किसी संख्या के संदर्भ में,इसके (संख्या ) तथा इसके व्युत्करम के बीच का अंतर इसके तथा इसके व्युतक्रम के योग का 25% है | संख्या का चौथा घात (fourth power ) इसके वर्ग से कितना प्रतिशत ( दशमलव के एक स्थान तक ) अधिक है ?

For a number, greater than one, the difference between itself and its reciprocal is 20% of the sum of itself and its reciprocal. By how much percentage (nearest to an integer) is the square of the number less than its cube ? एक से बड़ी किसी संख्या के संदर्भ में, इसके (संख्या ) तथा इसके व्युत्करम के बीच का अंतर इसके तथा इसके व्युत्रम के योग का 20% है | संख्या का वर्ग इसके घन से कितना प्रतिशत ( दशमलव के एक स्थान तक ) कम है?

A uranium nucleus ""_(92)U^(238) emits an alpha particle and a beta - particle in succession. The atomic number and mass number of the final nucleus will be

A uranium nucleus U-238 of atomic number 92 emits two alpha - particles and two beta -particles and trasnforms into a thorium nucleus. What is the mass number and atomic number of the thorium nucleus so produced?

A uranium nucleus U-238 of atomic number 92 emits two alpha - particles and two beta -particles and trasnforms into a thorium nucleus. What is the mass number and atomic number of the thorium nucleus so produced?

._(92)U^(238) is a natural alpha -emitter. After alpha -emission the residual nucleus U_(X1) in turn emits a beta -particle to produce another nucleus U_(X2) . Find out the atomic number and mass number of U_(X1) and U_(X2) .

._(92)U^(238) is a natural alpha -emitter. After alpha -emission the residual nucleus U_(X1) in turn emits a beta -particle to produce another nucleus U_(X2) . Find out the atomic number and mass number of U_(X1) and U_(X2) .

._(92)U^(238) is a natural alpha -emitter. After alpha -emission the residual nucleus U_(X1) in turn emits a beta -particle to produce another nucleus U_(X2) . Find out the atomic number and mass number of U_(X1) and U_(X2) .