Types of Bonds

There are 3 main types of chemical bonds: covalent, ionic, and metallic.

• False

• True

Covalent bonds occur when electrons are shared between 2 atoms and the bond is classified as polar or nonpolar.

Ionic bonds occur when one atom gives up one or more electrons and another atom accepts the electron.

Metallic bonds occur between 2 metal atoms of the same or different elements.

• Single, Double, Triple
• Alkaline, Transition, Noble
• Covalent, Ionic, Metallic
• Hydrogen, Helium, Lithium

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What are covalent bonds?

• Covalent bonds are formed by the transfer of electrons between atoms.
• Covalent bonds are weak attractions between molecules.
• Covalent bonds are chemical bonds formed by the sharing of electron pairs between atoms.
• Covalent bonds only occur in metals.

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What are ionic bonds?

• Ionic bonds are formed by sharing electrons between atoms.
• Ionic bonds are weak attractions between neutral molecules.
• Ionic bonds occur only in metals and do not involve nonmetals.
• Ionic bonds are chemical bonds formed through the electrostatic attraction between oppositely charged ions.

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What are metallic bonds?

pick 2

• Metallic bonds are the attractive forces between metal atoms and the delocalized electrons that surround them.
• is the way that metal atoms are kept together within a metal material. A metallic bond is a type of chemical bond similar to a covalent bond. Atoms in metals are held together by forces caused by the valence electrons

• Metallic bonds involve the sharing of electrons between two metal atoms.
• Metallic bonds are weak forces that occur in ionic compounds.

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A polar covalent bond usually involves 2 different types of atoms and occurs when one atom has a stronger pull on the electron, or a greater electronegativity. The ​ (a)   atom will have a slightly ​ (b)   charge and the other atom(s) will be slightly positive which results in poles on the molecule.

• stronger
• negative

A (a)   covalent bond usually occurs between 2 atoms of the same (b)   , which pull equally on the (c)   .

• nonpolar
• element
• electron

What is the difference in nonpolar and polar covalent bonds?

• Polar covalent bonds have unequal sharing of electrons, while nonpolar covalent bonds have equal sharing.
• Polar covalent bonds only occur in organic compounds.
• Nonpolar covalent bonds are stronger than polar covalent bonds.
• Polar covalent bonds have equal sharing of electrons, while nonpolar covalent bonds have unequal sharing.

Pauling Units (PU) are used to measure the (a)   of a (b)   .

Polar bonds have a measurement of 0.5-1.9 PU.

Non-polar bonds have a measurement of <0.5PU.

So polar non-polar has less than 0.5PU.

• electronegativity
• bond

Ionic bonds occur when one atom ​ (a)   or more electrons and another atom ​ (b)   the electron.​ (c)   ions attract each other resulting in a bond. The positively charged atom is called a cation and is usually a metal. The negatively charged atom is an anion and is usually a non-metal.

• gives up one
• accepts
• These oppositely charged