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Covalent Bonding
Chemical Reactions
100
Define chemical bond. And list 2 types and describe the formation.
Chemical compounds are formed by the joining of two or more atoms. Covalent bond: bond in which one or more pairs of electrons are shared by two atoms. Ionic bond: bond in which one or more electrons from one atom are removed and attached to another atom, resulting in positive and negative ions which attract each other.
100
Name the 5 type of reaction and what occurs in each.
What is combination reaction- 1cation and 1anion come together combustion reaction- A flame/ fire and O2 found in reactant decomposition reaction- 1 molecule + energy make 2 ions double-replacement reaction- 2 molecules switch anions or cations single-replacement reaction- molecule and an ion switch a anions or cations
200
Explain why resonance occurs, and give an example of one.
trend in which the structure of a molecule can be represented by two or more hypothetical structures involving single, double, and triple chemical bonds.
200
What’s a catalyst and how is it involved in a reaction?
It lowers the activation energy
300
Compare and contrast polar and non-polar bonds.
The greater the electronegativity difference, the more ionic the bond is. Bonds that are partly ionic are called polar covalent bonds. Nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.
300
NaCl + AgNO3 ---> AgCl + NaNo3is an example of ________. (Hint: type of reaction)
What is Double replacement
400
Discuss the VSEPR bonding theory.
Valence shell electron pair repulsion, VSEPR, is a super-simple technique for predicting the geometry of atomic centers in small molecules and molecular ions.
400
What the difference btw molecular and net ionic equations?
Molecular equation considers each reactant and product to be a neutral compound Net ionic equation puts the equation in terms of the ions that are actually reacting
500
List the three types of intermolecular forces and describe them.
London Dispersion Forces also known as van der Waal's Forces: are very weak forces of attraction between molecules, the more electrons that are present in the molecule, the stronger the dispersion forces will be. Dipole-dipole interactions: stronger intermolecular forces than Dispersion forces Btw 2 dipoles Hydrogen bonds: polar molecules results from a covalent bond between a hydrogen atom and either fluorine, oxygen or nitrogen