Flashcards in Flashcards Deck (264)
Can molecules with polar bonds be non polar?
Yes if there is no net dipole moment
What is the shape of an s orbital?
what is the shape of p orbital?
Which type of bonds form between atoms with small differences in electronegativity (.4-1.7)?
polar covalent bonds
Which type of bond forms between atoms with the same electronegativities?
non polar covalent bonds
What is a coordinate covalent bond?
one in which a pair of bonding electrons originates from just one of the atoms.
(T/F) A dipole moment exist when a molecule has a separation of positive and negative charges.
What is the formula for calculating formal charge on an atom involved in a covalent bond?
Formal charge= V-(1/2 N bonding + N nonbonding)
What are resonance structures?
2 or more non-identical lewis structures for the same molecules
(T/F) A lewis structure with small or no formal charges is preferred over one with large formula charges.
Should a negative formal charge be placed in highly electronegative atoms or weakly electronegative atoms?
highly electronegative atoms.
what are the bond orders of single, double, and triple bonds?
(T/F) A triple bond is longer than a single bond..
What is a bond energy?
amount of energy required to separate two bonded atoms
Can both bonding and nonbonding electrons be valence electrons?
nonbonding e- = not involved in a bond
bonding e- = involved in a bond
Which type of elements contains the halogens?
Which group of elements contains alkaline earths?
Which group of elements contains noble gases?
Which groups of elements contain the transition metals?
groups IB to VIIIB
what is an ionic bond?
transfer of electrons between two atoms
what is a covalent bond?
sharing of electrons between two atoms
what is a polar covalent bond?
has properties of ionic and covalent bonds. electrons are shared but not equal.
what is a cation?
(T/F) Metals are found on the left side of the periodic table and are good conductors of electricity and heat.
(T/F) Non metals are found in the middle of the periodic table and are malleable, ductile and shiny.
(T/F) Metalloids are found between the metals and nonmetals and have varying properties.
Which group of elements contains the alkali metals?
What is the electron affinity trend within the periodic table?
increases left to right across a period & up a group.
(T/F) Group VIIIA elements have high electron affinities.