Worksheetschem chemical bonding
Total questions: 22
Worksheet time: 17mins
The (a) rule states that atoms tend to form bonds so that each atom has eight electrons in its valence shell.
What is the goal in ionic bonding ???
cations and anions have a stable octet in its valence shell
one element has a stable octet in its valence shell
peace on earth in perpetuity
TRUE or FALSE
Ionic bonding occurs when atoms in a bond loses or gains electrons to achieve an octet in its valence shell
TRUE
FALSE
Ionic bonding occurs when atoms in a bond shares electrons to achieve an octet in its valence shell
The (a) attraction between positive ions and negative ions forms an ionic bond
What are the properties of metals ??
metals can be drawn into wires
metals have high melting and boiling points
metals can be hammered into different shapes
metals in solid form have specific crystal structures
metals are able to conduct electricity due to stationary electrons
The ___ __ ______ holds metal cation together throughout the entire solid
(a)
____________ ______ is the electrostatic attraction between the free-moving valence electrons and the positively charged metal cations in a sea of electrons
(a)
__________ ______ form when atoms of nonmetals are close enough to each other for their orbitals to overlap
(a)
TRUE or FALSE
Ionic bonds hold the atoms together in discrete molecules
TRUE
FALSE
Covalent bonds hold the atoms together in discrete molecules
Covalent bonds can be which type of bonds ??
single
quadruple
triple
double
Covalent bonds occur between ??
metals x metals
nonmetals x nonmetals
nonmetals x metals
Ionic bonds occur between ??
think enemies to lovers
nonmetals x metals
metals x metals
nonmetals x nonmetals
(a) is a measure of the tendency of an atom to attract a bonding pair of electrons
The Pauling scale is most commonly used, where ________ is assigned a value of 4.0 and ranges down to Cesium and Francium's 0.7
Hydrogen
Destrogen
Nitrogen
Fluorine
What if two atoms of equal electronegativity bond together ??
"A" and "B" are equally electronegative, both have the same tendency to attract the bonding pair of electrons
to get a bond like this, the "A" and "B" would usually have to be the same atom
this sort of bond could be thought as a "pure" covalent bond, where the electrons are shared even between the two atoms
this sort of bond could be thought as a "pure" ionic bond, where the electrons are shared even between the two atoms
What if atom "B" is slightly more electronegative than "A" ????
"A" will attract the electron pair rather more than "B" does
the bond is a polar covalent bond in which there is a separation of charge between one end and the other but slight
the bond is ionic bond in which there is a separation of charge between one end and the other but large
_______ ________ are intermolecular attractions between oppositely charged regions of polar molecules and stronger than dispersion forces
(a)
________ _______ are intermolecular forces in which a hydrogen force covalently bonded to a very electronegative atom is also weakly attracted to a lone electron pair of another elecrtonegative atom
(a)
What if atom "B" is much more electronegative than "A" ????
the electron pair will be dragged right over to "B's" end of the bond
Ions will form because "B" will have complete control over both electrons
The bond is ionic not polar covalent
what is the order of strength for intermolecular forces ???
(weakest ----> strongest)
1. Dispersion forces
2. Dipole interactions
3. Hydrogen bond
1. Dipole forces
2. Dispersion bonds
3. Hydrogen bond
1. Hydrogen bond
2. Dipole interactions
3. Dispersion forces
the STRONGER the intermolecular forces, the _________ the volatility because the molecules are held together strongly in the liquid phase, preventing them from entering gas phase
higher
lower
rounder
wider
(a) is a measure of how easily a liquid evaporates
