The number of valence electrons in each atom of an element affects the elements

The number of electrons in an atom's outermost valence shell governs its chemical properties. Elements react to form a closed shell, corresponding to the electron configuration s2p6 . This tendency is called the octet rule, because the atoms have eight valence electrons.

Explanation:

The number of valence electrons or outermost electrons present in an atom determines the chemical properties of an atom.

Therefore, atoms belonging to same group have same number of valence electrons. Thus, atoms of a group have similar chemical properties.

Hence, we can conclude that the number of valence electrons in each atom of an element affects the elements chemical properties.

the answer is the first option

explanation:

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answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).