Compounds And Their Bonds Flashcards

Terms Definitions
8 valence electrons
a positively charged ion
group of covalently bonded nonmetal ions with overall charge
dispersion forces
attractions between molecules caused by the electron motion on one molecule affecting the electron motion on the other through electrical forces; these are the weakest interactions between molecules
a negatively charged ion; takes an electron
tetrahedral- CH4, CCl4, SO4 2- (4:0); trigonal pyrimidal- NH3, NF3, PCl3 (3:1); bent- H2O, ClO2, OF2 (2:2); 109.5; The shape of a molecule with four bonded atoms
Uses prefixes to indicate the number of atoms in a formula
Nonpolar covalent bond
electrons are shared equally by atoms
(chemistry) the tendency of an atom or radical to attract electrons in the formation of an ionic bond
a pair of equal and opposite electric charges or magnetic poles separated by a small distance
Covalent bond
electrons are shared by atoms of two non metals such that each of the atoms achieves an octet
electronegatitivity value
a number that indicates the ability to attract electrons
polar covalent bond
A covalent bond between atoms that differ in electronegativity. The shared electrons are pulled closer to the more electronegative atom, making it slightly negative and the other atom slightly positive.
Valence-shell electron-pair repulsion
theory that predicts the shape of a molecule by placing the electrons pairs on a central atom as far apart as possible to minimize the mutual repulsion of the electrons
double bond
a covalent bond in which two pairs of electrons are shared between two atoms
ionic bond
the attraction between opposite charged ions by the transfer of electrons
True or False: electrons are transferred in ionic compounds
valence electrons
electrons present in the outermost shell of an electron atom, which are largely responsible for the chemical behavior.
Binary compounds
two different elements, end in -ide
Ionic charge
the difference between the number of protons and number of electrons written in the upper right corner of the symbol for the element or polyatomic ion
a bonding arrangement in which an atom is bonded to three atoms in a triangular pyramid
Octet rule
tendency for atoms to attain a noble gas electron arrangement; elements in groups 1A-7A react with other elements by forming ionic or covalent bonds to produce a noble gas arrangement, usually 8 electrons in the outer shell
nonpolar-covalent bond
a covalent bond in which the electrons are shared.
triple bond
a covalent bond in which two atoms share three pairs of electrons
electron dot structure
representation of an ion or atom with valence electrons.
nonmetal and nonmetal
Hydrogen bond
attraction between a partially positive H atom and a strongly electronegative atom of F, O, or N
a group of symbols representing the atoms or ions in a compound
nonpolar molecule
molecules held together with nonpolar bonds or polar bonds arranged symmetrically so they cancel each other out
The shape of a molecule with two bonded atoms and two lone pairs
the smallest unit of two or more atoms held together by covalent bonds
the shape of a molecule that has two bonded atoms and no lone pair
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