Chem Chapter 3
What are the bond angles in a trigonal planar structure?
120 degree
How many valence electrons are in CH3NH2?
14
Match the atoms with their correct geometry?
3 = Trigonal planar geometry 1 = Tetrahedral geometry 2 = Trigonal pyramid
The molecule shown contains a total of ______ covenant bonds and _____ lone pairs of electrons.
6 3
Many atoms bond in such a way as to attain and outer shell of ___ electrons; this is known as the ____ rule.
8; octet
Match each element with the predicted charge of its monatomic ion?
A nonmetal in group 6A = -2 A transition metal = variable charge A metal in group 1A = +1 A halogen element = -1
Match each element with the predicted charge of its monatomic ion. A) A nonmetal in group 6A B) A transition metal C) A metal in group 1A D) A halogen element
A) -2 B) variable charge C) +1 D) -1
Match each neutral atom with the correct number of dots used in the atom's Lewis symbol. A. H B. B C. Si D. Ca
A. 1 B. 3 C. 4 D. 2
Match the atoms with their correct geometry. A. Trigonal pyramid B. Tetahedral geometry C. Trigonal planar geometry
A. 3 B. 1 C. 2
Rank the carbon-carbon bonds in order of decreasing bond length. A. C=- C B. C=C C. C-C
A. 3 B. 2 C. 1
Match the names and formulas of the polyatomic ions below. A. CIO B. CIO2 C. CIO3 D. CIO4
A. Hypochlorite B. Chlorite C. Chlorate D. Perchlorate
Match the molecules with their correct geometry. A. H2C=O B. COS (C is the central atom) C. So2 (Sis the central atom) D. Ph3
A. Trigonal planar geometry B. Bent geometry C. Linear geometry D. Trigonal pyramid
Fill the blanks to provide the correct name for each ion below. A. Ca`2+ ____ ion B. Al`3+ ____ion C. Fe`3+ ____ ion D. Pb`4+ _____ion
A. calcium B. aluminum C. iron (lll) D. lead (IV)
Identify each descrition below as either being characteristic of metals or nonmetals in ionic bonding. A. _____ form cations B. _____ have high ionization energies C. _____ have low electron affinities
A. metals B. nonmetals C. metals
Provide subscripts to give the correct formula for the compound formed by barium and phosphorous.
Ba3 P2
The formula for the compound carbon tetra chloride is ______.
CCI4
Fill in the blanks to provide the correct name for each ion below.
Ca`2+ = calcium ion Al`3+ = aluminum ion Fe`3+ Iron(lll) ion Pb`4+ = lead(lV) ion
Which of the following describe intermolecular forces?
Determine the solubility of compounds Determine the freezing and boiling points of compounds Forces between molecules
Which of the following statements correctly describe the formation ions?
Group 6A nonmetals form -2 ions Main group metals typically form ions with a noble gas electronic configuation
Which of the following formulas represent ionic compounds?
K2O MgO
Give the correct systematic name for the compound Mg(NO2)e
Magnesium nitrate
Which of the following substances are soluble in water?
Methanol (CH2OH) KCI
Match the chemical formula with its correct name?
No2 = nitrogen dioxide PCI3 = phosphorous trichloride N2O = dinitrogen monoxide PCI5 = phosphorous pentachloride
How does the statement "like dissolves like" apply to the basic principles of solubility?
Polar solutes are attracted to polar solvents and nonpolar solutes are attracted to nonpolar solvents.
List elements below in order of increasing electronegativity.
Rb K Ge Br
Which of the following are characteristic of most ionic compounds?
Solid at room temperature Relatively high melting point
Which statement below correctly describes what happens when an Ionic compound dissolves in water?
The cations and anions separate and become surrounded by water molevules
List the common prefixes in order of increasing number of atoms.
Tri- Penta- Hepta- Nona-
List the molecular geometries in order of increasing bond angles
Trigonal pyramid bond Tetrahedral geometry Trigonal planar geometry Linear geometry
Electronegativity measures _____.
an atom's attraction for electrons in a bond
In ionic compounds, metals form ______, whereas nonmetal form ____. For a main group element, the charge of its ion can be determined from the ____ number.
cations anions group
Isomers are ____.
compounds with the same molecular formula that have different structures
Isomers are ______.
compounds with the same molecular formula that have different structures
A molecule with a ____ has a more negative region and a more positive region that align with an electric field.
dipole
When molecules placed in an electric field align with the field, they are said to have a ______.
dipole
Attractive forces that exist within a molecule are termed _____ forces.
intramolecular
In ______ bonds, electrons are transferred from one element to another to form charged particles, which then attract each other. In ______ bonds, electrons are shared between two atoms.
ionic covalent
By adding three electrons to its valence shell, nitrogen would be isoelectronic in electron configuration with the element _____
neon
A covalent bond is a _____-electron bond in which the bonding atoms share their _____ electrons
two; valence
