i need help ls i thank its book 500 grams
Each column is called a group<span>. The elements in each </span>group have<span> the same number of electrons in the outer orbital. Those outer electrons are also called valence electrons.</span>
I think it's 2 I tried looking it up because I was not sure.
Answer : The correct option is, (D)
Explanation :
(A)
This reaction is a double displacement reaction in which the cation and anion of two reactants are exchange their places to give two different products.
(B)
This reaction is a decomposition reaction in which the larger molecule decomposes to give two or more products.
(C)
This reaction is a neutralization reaction in which an acid and a base react to give a salt and water as a product.
(D)
This reaction is a redox reaction in which the oxidation and reduction reaction occur simultaneously.
Oxidation reaction is the reaction in which a substance looses its electrons. In this oxidation state increases.
Reduction reaction is the reaction in which a substance gains electrons. In this oxidation state decreases.
In this reaction, magnesium shows oxidation due to change in oxidation number from (0) to (+2) and hydrogen shows reduction due to change in oxidation number from (-1) to (0).
Hence, the correct option is, (D)