Can anyone help?
H2O, NH3, CH4, and CO2
Electronegativity between the atoms
Identify a either ionic or covalent
State whether the molecule is polar or non-polar
Identify the structure as having hydrogen bonding, dipole-dipole moments or London dispersion forces
Yes i know this is math but more people are active here

Question

Can anyone help?
H2O, NH3, CH4, and CO2
Electronegativity between the atoms 
Identify a either ionic or covalent
State whether the molecule is polar or non-polar
Identify the structure as having hydrogen bonding, dipole-dipole moments or London dispersion forces 
Yes i know this is math but more people are active here

jhannybean · Answer

Electronegativity is found by looking at the elements on the periodic table: increasing vertically and to the right

ionic compounds are: salts, metal oxides (MO) , metal hydroxides (MOH)

(think you meant molecular) : Nitrogenous bases (ex NH3 - ammonia) , covalent compounds (ones with odd number of atoms, greek prefixes) , Acids ( H + something)

Polar/Nonpolar : Depends on the type of compound it is (ionic or molecular - if it's ionic, then it has to be a soluble salt, etc.. , molecular - polar covalent bond)

Hydrogen bonding : H+ + N, O, F 

Dipole-Dipole : polar -polar molecule

LDF - Attraction between 2 nonpolar molecules (compounds that are covalent)