2different elements have the same number of neutrons

Sodium and Magnesium are the two different element having same number of neutrons.

Explanation:

Neutron:

It is a subatomic particle,but without an electric charge,present in all the atomic nuclei except those of ordinary hydrogen.

Its symbol is n with no charge on it.

sodium and magnesium have the same number of neutrons.

name of the element : Sodium

symbol: Na

atomic number: 11

number of protons: 11

number of neutrons: 12

number of electrons: 11

distribution of electrons: 2 , 8 , 1  

valency: 1

name of the element : Magnesium

symbol: Mg.

atomic number: 12

number of protons: 12

number of neutrons: 12

number of electrons: 12

distribution of electrons: 2 , 8 , 2  

valency: 2

answer:

the reaction is type of combination reaction.

explanation:

on the product side, there are 2 molecules of bonded to fe   which means one atom of fe are combined two molecules of . so, balanced chemical equation becomes :

this reaction follows the reaction type of combination reaction. a combination reaction is defined as chemical reaction in which reactants combines together to form a single product.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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