The following balanced equation represents what type of reaction? 2 H2O → 2 H2 + O2
Select one:

a.
double displacement

b.
single displacement

c.
synthesis

d.
decomposition

D.) decomposition

Explanation:

A.) is incorrect. In double-displacement reactions, the cation of one compound is swapped with the cation of another.

These reactions have the general structure: AB + CD > AD + BC.

B.) is incorrect. In single-displacement reactions, the an element within a compound is swapped with another element.

These reactions have the general structure: AB + C > AC + B.

C.) is incorrect. In synthesis reactions, two or more elements/compounds are combined to create a new and larger compound/molecule.

These reactions have the general structure: A + B > AB.

D.) is correct. In decomposition reactions, a compound/molecule is broken down into smaller elements/compounds. In the given reaction, water (H₂O) separates into its respective elements, hydrogen (H₂) and oxygen (O₂).

These reactions have the general structure: AB > A + B

explanation: no but i do not usually comment

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

            and  

since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.