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physical science
| Question | Answer |
|---|---|
| a bond between atoms with very different electronegatives is... | ionic |
| diatomic molecue | molecule made from 2 atoms |
| electronegatives between 2 atoms are even slightly different they form... | polar covalent bond |
| atom | the basic unit of a chemical element |
| what types of atoms do nonpolar covalent bonds occur between? | identical atoms example O2 |
| in an ionic bond what happens to the electrons? | the more electronegative atom seizes all the bonding electrons and becomes a negative ion while the other atom becomes a positive ion |
| how many bonds in each of the elements in the structural formula have? | H-1 O-2 N-3 C-4 |
| put these elements in order from least to most electronegative: C, H, F, O, BR, N, S | H, C, S, Br, N, O, F |
| explain how electronegativity changes throughout the table? | values increase from left to right and from top to bottom |
| if you have a bond between a metal and a nonmetal, which of the two is more electronegative? | nonmetal is more electronegative |
| what are the 2 most electronegative and electropositive elements on the periodic table? | F and Fr (repectively) |
| what is the electronegativity differnce of the atoms listed below? KF | 3.16 |
| what is the octect rule? | atoms will combine there outer shell to 8 electrons |
| what is a chemical bond? | a force that holds together in the atoms substance |
| name and explain the 2 major types of bonds? | Ionic and covalent |
| do metals tend to gain or lose electrons? | they tend to lose electrons because metals have 3 or fewer electrons in their outer shell |
| how do you know and atom is stable? | outer electron shell is full with 8 electrons |
| what is a chemical formula? | when two elements from the PT are joined together to make another substance |
| non polar molecule | does not have oppositely charged ends |
| oxidation number | the change of atoms based on how many electrons it loses |
| covalent | bond between nonmetals; electrons are shared |
| polar molecule | positive end and a negative end |
| ionic | bond between a metal and a nonmental; electrons are gained or lost |
| what charge does a cation have? | positive charge (+) |
| what does electronegativity have to do with polarity? | in a polar bond the more electronegative atom will have the majority of the electrons |
| what types of atoms do polar covalent bonds occur between? | 2 atoms that share electrons but the electrons are attracted to one of the atoms more than the other (ex. CO2) |
| Ion | an atom or molecule that has gained or lost one or more of its valence electron; positive or negative charged |
| polar covalent bond | two atoms share bonded pairs of electrons somewhat unequally |
| nonpolar covalent bond | bonds between atoms with nearly the same electronegativity value |
| electronegativity | measures how stongly an atom will attract shared electrons |
| isotope | one of two or more atoms that have the same number of protons but a differnt amount of neutrons |
Created by:
rhoude08