Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
chem unit four
bonding
| Question | Answer |
|---|---|
| ionic bonding | electrons are transferred from one atom to another creating oppositely charged ions the are attracted to each other |
| ionic compounds are... | metal+nonmetal |
| properties of ionic compounds | crystalline solids at room temperature, higher melting points than covalent compounds, conduct electrical current in molten or solution state, most are solvable in water but not soluble in non-polar solvents, brittle |
| why don't ionic solids conduct electricity? | they are tightly held in position when they are solid not allowing the ions to flow towards the opposite charge |
| why do aqueous ionic compounds conduct electricity? | ions are free to flow towards an opposite charge causing an electrical current |
| metallic bond | metal atoms are held together by a "sea" or cloud of delocalized electrons |
| metallic compounds are... | metal+metal |
| properties of metallic bonds | crystalline solids at room temperature, have lower melting points and boiling points compared to ionic compounds, conduct electrical current in solid state - electrons move, malleable, ductile, tenacious, lustrous, good conductors of heat |
| covalent bond | electrons are shared between two atoms |
| covalent compounds are... | nonmetal+nonmetal |
| properties of covalent compounds | can be solid, liquid, or gas at room temperature, can be crystalline but not always, poor conductors of heat and electricity, make discrete units called molecules, most properties are determined by the interactions between molecules |
| what does B get in covalent bond lewis structure? | three bonds only |
| what does P get in covalent bond lewis structure? | can make five bonds |
| what does S get in covalent bond lewis structure? | can make six bonds |
| where do electronegativity values tend to increase and decrease on the periodic table? | increase - northeast; decrease - southwest |
| nonpolar covalent bond | bonds that are between identical atoms, but bond between atoms with nearly the same electronegativity can also be considered nonpolar |
| polar covalent bond | two atoms share bonded pairs of electrons somewhat equally |
| ionic bond (homework with bears definition) | a large difference in electronegativity resulting in an atom taking all the electrons causing one atom to be positive and the other to be negative and for them to attract each other |
| electronegativity | the tendency of an atom to attract shared electrons |
| dipole | a polar molecule |
| polar - asymmetrical | polar molecule |
| polar - symmetrical | nonpolar molecule |
| non polar - a/symmetrical | nonpolar molecule |
| intermolecular forces (van der waals forces) | attractions between molecules |
| dispersion forces | attractions between nonpolar molecules, they happen when nonpolar molecules become quickly and temporarily polar, generally they are very weak attractions, the larger the electron cloud the stronger the attraction |
| dipole-dipole | attractions between polar molecules |
| hydrogen bonding | attractions between a hydrogen that is attracted to a N, O, or F in one molecule that is a N, O, or F in a different molecule |
| resonance structure | has arrows showing that the double bond can go in any spot |
| polyatomic ions | similar to the covalent lewis structure but has a bracket and ionic positive or negative sign which also gets added or subtracted to the math problem |
| surface tension | highest - hydrogen bonding, middle - dipole-dipole, lowest - dispersion forces |
| melting/boiling point | highest - ionic, middle - metallic, lowest - follow dispersion forces |
Created by:
kyla_snyder_
Popular Chemistry sets