Chapter 16- Chemical Bonds
What do the subscripts in the C2H6 represent?
2 Carbon atoms, 6 hydrogen atoms
What does the subscript 2 in H2O mean?
2 Hydrogen Atoms
Predict the formula for a molecule containing carbon (C) with an oxidation number of 4+ and oxygen (O) with an oxidation number of 2-.
CO2 (carbon dioxide)
Know how to draw Lewis dot diagram for the following: a. Bi b. Ge c. Ne d. SrI2
Pg 364
Using the periodic table, what is the oxidation number (element's charge) of: a. calcium b. aluminum c. fluoride
a. +2 b. +3 c. -1
write the chemical formulas for the following compounds a. sodium iodide b. aluminum hydroxide c. magnesium sulfide d. ammonium nitrate
a. NaI b. Al(OH)3 c. MgS d. (NH4)(NO3)
For each of the molecule formulas listed below, name each element and tell how many of atoms of each element are in that molecule. a. C6H12O6 b. CaCO3 c.Al2O3 d.B(OH)3
a. carbon-6, hydrogen-12, oxygen-6 b. calcium-1, carbon-1, oxygen-3 c. aluminum-2, oxygen-3 d.boton-1, oxygen-3, hydrogen-3
Using the periodic table: a. determine the oxidation number of Ca and Cl b. write the chemical formula for calcium chloride
a.Ca^2+, Cl^1- b.CaCl2
Name the following compounds a.KI b.SrCl2 c.KNO3 d.Al2O3
a.Potassium Iodine b. Strontium Chloride c. Potassium Nitrate d. Aluminum Oxide
Which of the following would be a correct chemical formula for a molecule of N^3- and H^+? a. NHO3 b. H2N6 c.NH3
c. NH3
Summarize the differences between a covalent compound and an ionic compound.
covalent bond- a representation of a compound that includes the symbols and ratios of atoms of each element in the compound ionic bond- a bond that transfers one or more electrons from one atom to another, resulting in attraction between oppositely charged ions
Which group of elements usually don't form chemical bonds?
noble gases
When atoms form chemical bonds, which of their electrons are involved in the bonds?
outer valence electrons
What type of bond holds a water molecule together?
polar covalent bonds
How does the oxidation number (element's charge) indicate if an electron will be lost or gained by the bonding atom?
positive- electrons will be lost negative- electrons will be gained
What do all organic molecules have in common?
they all contain carbon
In a Lewis dot diagram, what is represented by the dots surrounding the element symbol?
valence electrons