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Repaso de temas de átomos

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El estudiante resuelve ejercicios de los temas: ,Átomos, aplicando los conceptos teóricos desarrollados, a fin de poder prepararse para su examen y tenga una buena calificación

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QUIMICA GENERAL TALLER DE RE
(1 PC)

Ing° Jayme Ponce Dávila

2023 - Ciclo 1
Arequipa
S04. s1

, Reglas básicas para el desarrollo
del curso:

Se podrá ingresar TARDE a
clase de cinco en cinco
PUNTUALIDAD alumnos.

Pasados 15 minutos del
inicio, ya no está permitido
el ingreso.


UTP: Química general - Jayme Ponce Dávila

,Reglas básicas de
comportamiento para el
dictado del curso:




UTP: Química general - Jayme Ponce Dávila

, Logro de aprendizaje de la sesión:


Al finalizar la sesión, el estudiante repasa
los temas más importantes trabajados hasta
el momento, a fin de poder prepararse para
su práctica calificada.




UTP: Química general - Jayme Ponce Dávila

, Pregunta 1

La suma del número de masa de tres isótopos es 153 y
el promedio del número de neutrones es 27.
Calcula el número atómico correspondiente




UTP: Química general - Jayme Ponce Dávila

, Pregunta 1 - SOLUCIÓN
Se pide calcular el número atómico de un elemento,
dados los datos para tres isótopos. Luego: A = p + n
Tenemos que: Remplazando en (1) te
La suma del número másico de tres isotopos es 153 p₁ + n₁ + p₂ + n₂ + p₃ +
(1) A₁ + A₂ + A₃ = 153 p₁ + p₂ + p₃ + 81 = 15
El promedio del número de sus neutrones es 27 3p = 153 - 81 = 72
(2) (n₁ + n₂ + n₃ ) / 3 = 27 P = 72/3 = 24
(n₁ + n₂ + n₃ ) = 27 x 3 = 81
Si son isótopos signific
tienen el mismo núme
(Z) pero diferente núm
(A), entonces el núme
Z = 24
UTP: Química general - Jayme Ponce Dávila

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