Estructura atómica
Authored by ALFONSO HAMAL ORTIZ RAMÍREZ
Chemistry
11th Grade
Used 3+ times
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40 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Un átomo tiene 17 protones, 18 neutrones y 17 electrones. ¿Cuál es su número de masa (A)?
Answer explanation
Correcto. El número de masa A = protones + neutrones = 17 + 18 = 35
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
El ion Ca²⁺ tiene 20 protones. ¿Cuántos electrones posee?
Answer explanation
Correcto. Ca²⁺ ha perdido 2 electrones, por lo que tiene 20 - 2 = 18 electrones
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Un átomo neutro tiene 26 electrones. ¿Cuál es su número atómico (Z)?
Answer explanation
Correcto. En un átomo neutro, el número de electrones = número de protones = Z = 26
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
El isótopo ⁶⁰Co tiene 27 protones. ¿Cuántos neutrones contiene?
Answer explanation
Correcto. Neutrones = A - Z = 60 - 27 = 33
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Un ion O²⁻ tiene 8 protones. ¿Cuántos electrones posee?
Answer explanation
Correcto. O²⁻ ha ganado 2 electrones, por lo que tiene 8 + 2 = 10 electrones
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
El átomo de cloro-37 (³⁷Cl) tiene número atómico 17. ¿Cuántos neutrones contiene?
Answer explanation
Correcto. Neutrones = 37 - 17 = 20
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Un átomo tiene 15 protones, 16 neutrones y 18 electrones. ¿Cuál es su carga neta?
Answer explanation
Correcto. Carga = protones - electrones = 15 - 18 = -3
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