chemistry #4 Ionic bonding #2

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chemistry #4 Ionic bonding

2 classes of chemical compounds

1. ionic compounds
2. molecular compounds

ionic compounds traits (5)

1. - have high melting points, brittle, usually solid crystal at room temperature
2. - good conductors of electricity when they are in liquid state or in solution.
3. do not have molecules as their basic structural unit
4. positively and negatively charged particles called ions are present
5. after the transfer each atom becomes oppositely charged-->thus attracted to each other

molecular compound traits (4)

1. - have lower melting points and often pliable
2. - tend to be gases, liquids, or low-melting solids.
3. - do not conduct electricity in their liquid state.
4. basic structural unit is a molecule
5. sharing causes a region of high electron density (neg charge) btw atoms & both nuclei are attracted to the high density

Ionic bonds occur between

1. metal and nonmetal
2. metal and polyatomic ion
3. polyatomic ion and a polyatomic ion.

ionic bonds are

1. a complete transfer of electrons from one atom to another
2. formed through the transfer of one or more electrons from one atom or group of atoms to another atom or group of atoms = ionic compound


charged particles resulting from the loss or gain of electrons.

chemical bond

1. is the attractive force (electrical)that holds two atoms together in a more complex unit.
2. They form as a result of interaction between electrons found in the outer most shell of the elements.
3. Join the atoms together in a compound

Covalent bonds

1. formed through the sharing of one or more pairs of electrons between two atoms = molecular compound
2. occur between 2 nonmetals


unit of matter that results when two or more atoms are joined by covalent bonds

structural formula

shows the specific connections between atoms

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