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Construcción fórmulas químicas

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Construcción fórmulas químicas

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(105)
Played 1714 %Accuracy 54 Average time 01:35
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About this activity

Actividad de evaluación diagnóstica

Created by

Javier Cruz Guardado
Javier Cruz Guardado
Mexico

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Construcción fórmulas químicas
 

Construcción fórmulas químicasOnline version

Actividad de evaluación diagnóstica

by Javier Cruz Guardado
1

El número de oxidación de un elemento combinado con otro, es cero.

2

La fórmula H2O expresa que la molécula de agua está constituida por dos átomos de hidrógeno y uno de oxígeno.

3

En la fórmula 3 NH4Cl el coeficiente es el 4.

4

Al número entero positivo, negativo o cero que se asigna a cada elemento en un compuesto, se denomina número de oxidación.

5

En América, la construcción de una fórmula química se escribe primero la parte negativa y enseguida la positiva.

6

Los subíndices expresan el número de átomos de los elementos presentes en una molécula o unidad fórmula.

7

El símbolo Cl - indica que el átomo de cloro ha tenido una reducción o pérdida de electrones.

8

Una fórmula química sólo expresa la composición cualitativa de una sustancia.

9

En una fórmula química, los coeficientes indican el número de moléculas o unidades fórmula; así como también el número de moles presentes de la sustancia.

10

En una fórmula química la suma de cargas negativas y positivas siempre es mayor de cero.

 
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