AP BIOLOGY

BIOCHEMISTRY

POLAR AND NONPOLAR MOLECULES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When forming an ionic bond, a metal atom
A
Gains electrons to form a cation
B
Loses electrons to form a cation
C
Gains electrons to form an anion
D
Loses electrons to form an anion
Explanation: 

Detailed explanation-1: -A metal atom loses one or more electrons to form a cation with an octet. The same number of electrons are accepted by the appropriate number of atoms of a nonmetal to form an octet in the anion, producing an ionic compound.

Detailed explanation-2: -Usually metals lose their valence electrons to form cations while non-metals accept electrons and form anions.

Detailed explanation-3: -Metal atoms lose electrons from their outer shell when they form ions: the ions formed are positive, because they have more protons than electrons. the ions formed have full outer shells.

Detailed explanation-4: -Ionic bonds involve a cation and an anion. The bond is formed when an atom, typically a metal, loses an electron or electrons, and becomes a positive ion, or cation. Another atom, typically a non-metal, is able to acquire the electron(s) to become a negative ion, or anion.

Detailed explanation-5: -Hint: When an atom loses one or more electrons, it gains appositive charge and is known as cation and when a metal gains one or more electrons it is marked as negative charge and known as anion. Metal atom forms an ionic bond by losing an electron to a nonmetal.

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