chem
a nonpolar covalent bond is most likely to form between two elements that have a difference in electronegativity values of
0.1.
mono
1
a polar covalent bond is most likely to form between two elements that have a diffference in electronegativity values of
1.5.
deca
10
fige basic steps in drawing a lewis structure
1: draw a lewis structure for each atom in the compound 2: determine the total number of valence electrons in the compond 3: arrange the lewis structure to show how the atoms bond in the molecule 4: distribute the electron dots so that each atom, except for hydrogen and boron, satisfies the octet rule 5: change each pair of dots that represents a shared pair of electrons to a long dash 6: count the number of electrons surrounding each atom
di
2
tri
3
an ionic bond is most likely to form between two elements that have a diffference in electronegativity values of
3.0.
tetra
4
penta
5
hexa
6
hepta
7
octa
8
nona
9
which of the following substances has the lowest boiling point?
Cl2
which of the following substances most likely has the lowest boiling point?
Cl2
which of the following compounds most likely has the least bond energy?
I2; I-I bond length = 266 pm
how many different kinds of covalent bonds can a nitrogen atom form
a nitrogen atom has five valence electrons. to have a complete octet of electrons, the nitrogen atom forms three covalent bonds. it could form three single bonds, one single and one double bond, or one triple bond
a covalent bond forms when the attraction between two atoms is balanced by repulsion and the potential energy is
at a minimum
why do most atoms form chemical bonds
atoms form chemical bonds to establish a more stable electron arrangement. As independent particles, they have large potential energies. By bonding, they deserve their potential energy, thus becoming more stable
according to VSEPR theory, the molecular shale of H2O is classified as
bent
the chemical bond formed when two atoms share one electron is a
covalent bond
to indicate resonance, a _____ is placed between a molecule's resonance structures
double-headed row
which of the following number of atoms can form a tetrahedral molecule
five
explain how it is possible for a binary compound between between fluorine and iodine to form, and describe the kind of bond formed in such a reaction
fluorine and iodine can form a binary conpound because fluorine has such a strong attraction for electrons that it can attract one of iodine's electrons to form a covalent bond. the bond formed in such a case is polar covalent because the difference in electronegativity between two atoms 1.3
in a double bond, two atoms share a total of ______ electrons
four
the correct lewis structure for a group 18 atom has
four pairs of valence electrons
if two covalently bonded atoms move farther than a distance of the bond length, the potential energy of the atoms
increases
according to VSEPR theory, the molecular shape of CO2 is classified as
linear
according to VSEPR theory, which of the following shapes is possible for a molecule with the molecular formula of AB2
linear and bent
according to VSEPR theory, which of the following shapes is possible for a molecule with the molecular formula of AB3
linear and trigonal pyramid
according to the VSEPR theory, a molecule with the molecular formula of A2 is
linear in shape
the correct lewis structure for a molecule of the compound C2H2 contains
one triple bond
Iodine monochlorife, ICI, has a higher boiling point than bromine, Br2, partly because ICI is a(n)
polar molecular substance
explain why scientists use resonance structures to represent some molecules
resonance structures picture the bonding in molecules that cannot be correctly pictured with a single lewis structure.
the correct lewis structure for the boron atom has
three single valence electrons
the correct lewis structure for a fluorine atom in a molecule of F2 shows
three unshared pairs of electrons, an octet of valence electrons, one shared pait of electrons
the correct lewis structure for the boron atom has
two pairs of valence electrons and two single valence electrons
the correct lewis structure for the oxygen atom has
two pairs of valence electrons and two single valence electrons
The electrons involved in the formation of a covalent bond are
valence electrons
