Bond Types
What is the type of bond formed when valence electrons are shared?
covalent
What is the intermolecular force created between molecules with oppositely charged ends?
dipole
What is the charge on an ion when the atom loses 2 electrons?
2+
What is the molecular shape of a molecule that has 4 atoms around the central atom and no lone pairs?
tetrahedral
Between H20 and H2S, which has a higher boiling point?
H2O
What is the bond formed when valence electrons are transferred?
ionic
What is force of attraction between unpaired electrons of a highly electronegative element of one molecule and a hydrogen atom of another molecule?
hydrogen bond
When an atom loses an electron, what type of ion does it form?
cation
What is the molecular shape of a molecule with 3 atoms attached to the central atom with 1 lone pair of electrons around the central atom?
Pyramidal
What is the reason for higher melting/boiling points?
Greater intermolecular forces
When the electronegativity difference between to atoms is 1.1 the bond type is ___________
polar covalent
What is the intermolecular force involved when molecules can't form H-bonds or dipole interactions?
dispersion force
What many electrons does oxygen have?
8
What is the molecular shape of H2O?
Bent
Which has the highest boiling point - polar covalent, nonpolar covalent and ionic compound?
Ionic Compounds
Name an intRAmolecular force.
bonds between atoms - ionic and covalent bonds
What is the relationship between intermolecular forces and melting/boiling point?
The stronger the intermolecular forces, the higher melting/boiling point
Which molecule has a higher boiling point - N2 or Br2?
Br2
What is the shape of two atoms bonded together with a polar bond?
Asymmetrical linear
What intermolecular forces are responsible for the lowest boiling points?
dispersion forces
For a molecule to be polar, what TWO things does it need:
Polar bonds between atoms and an asymmetrical shape
What is the strongest of the intermolecular forces?
hydrogen bonds
Due to their valence electrons, what group do the halogens bond with most often?
Alkali metals
What type of molecular is formed when it has a tetrahedral shape along with polar bonds?
Non-polar molecule
Between hydrogen bonds and dipole-dipole interactions, which will have lower boiling points?
Dipole-Dipole