How many hydrogen atoms are involved in this reaction? 3
Answer is valence electron, they all have total of 2 valence electron.
remember group number = valence electron
Magnesium is classified as a metal. Magnesium has two valence electrons
I think the correct answer from the choices listed above is option B. The list which includes three type of chemical reactions would be decomposition, single replacement, and double replacement. These are the most basic reactions in chemistry and are the basis for other types of reactions.