NCERT Lab Manual III — task. Science CBSE, Class 10.

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Answer the following questions:

Answer variants:

Magnesium is a highly reactive element that combines with oxygen to form magnesium oxide that does not burn.

The total electron content of

$Mg^2{^+}$ and

$O^2{^-}$ is

$40$ .

Each metal reacts with their salt solution more reactive metal reacts less, less will be most.

The total electron content of

$Mg^2{^+}$ and

$O^2{^-}$ is

$20$ .

1. Why should magnesium ribbon be cleaned before burning it in air?

2. What is the total electron content of the species

$Mg^2{^+}$ and

$O^2{^-}$ ?

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79. NCERT Lab Manual III