Question 3

There are three different types of bonds Covalent, ionic, and metallic.

Chemical reactions are formed when 2 or more atoms are chemically bonded together. The result leaves a compound both chemical and physical from the parent atoms.

Ex. Sodium (metal) + chlorine (gas) makes table salt

Ionic bonding

During an ionic bond electrons are passed from atom to atom. while this is happening the atom will either lose or gain an electron, which this reaction will form an ion. The oppositely charged ions are drawn together by static electricity, which creates the ionic bond.

FACTS

- Ionic bonds come from a nonmetal and a metal.

-Ionic compounds conduct electricity.

-Will form crystals.

-Have a high melting point.

-Ionic compounds are solid.

Covalent bonding

Covalent bonding occurs when atoms share electrons, and when the use their electrons in similar ways. Covalent bonds usually occur when 2 nonmetals happen to bond. Instead of both atoms gaining electrons they share electrons, to complete their valance shells.

FACTS

-Electrons are shared.

-Occur by two nonmetals

-Covalent bonds are not strongly attracted to each other.

-Typically liquids or gasses.

Ex. Hydrogen bonding together to make H2

Metallic bonds

Metallic bonding is the bonding of 2 metals, that share electrons throughout each others metal atoms. Metallic bonding is based on the orbital theory ( s,p,d,f). Which basically shows the interaction of a delocalized electron and metal nuclei. The metals physical properties can usually be found by the molecular orbital theory.

FACTS

-Typically have high melting points.

-Most metals are examples of metallic bonding.

-Conduct electricity very well.

-Most metals only have one or two valence electrons.

Ex. Iron (Fe), lithium (Li), potassium (K)

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