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Nonmetallic elements form ions by valence electrons to complete their outer shell. The valence electrons an element has in its outer shell, the easier it is to complete. The electron shells an element has, the easier it is to fill its outermost shell. Reactivity in nonmetals as you go from left to right in a group, and as you go from top to bottom.

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Answer to the first one is GAINING
Second one is MORE
Third is FEWER
Fourth is INCREASES
Fifth is DECREASES
Lanuel

I. Nonmetallic elements form ions by gaining valence electrons to complete their outer shell.

II. The more valence electrons an element has in its outer shell, the easier it is to complete.

III. The fewer electron shells an element has, the easier it is to fill its outermost shell.

IV. Reactivity in nonmetals increases as you go from left to right in a group, and decreases as you go from top to bottom.

An atom can be defined as the smallest unit which comprises the matter that forms all chemical elements. Thus, atoms are typically the fundamental building blocks of matter and as such determines (defines) the structure of a chemical element.

Generally, atoms are typically made up of three (3) distinct particles and these are;  

  • Protons.
  • Neutrons.
  • Electrons.

Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, the valency or number of valence electrons is a property is typically used to determine the chemical properties of all chemical elements.  

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