Unit 6 Vocabulary

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Chemistry - Unit 6 Vocabulary

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Question Answer
Chemical Bond When 2 or more electrons rearrange Valence Electrons to increase stability.
Ionic Bond Forms when valence electrons are transferred from one atom to another.
Covalent Bond When electrons are shared, forming molecules.
Non-Polar Covalent Bond When electrons are shared equally because atoms have the same electronegativity.
Polar Describes a molecule in which the positive and negative charges are separated.
Polar Covalent Bond When electrons are shared unequally, creating partially charged ends or poles.
Molecule The smallest unit of substance that keeps all of the physical and chemical properties of that substance.
Molecular Compound A chemical compound whose simplest units are molecules.
Chemical Formula Representation of a substance using symbols for its constituent elements.
Molecular Formula A chemical formula that shows the number of and kinds of atoms in a molecule.
Bond Energy The difference in the electronegativity of the two atoms bonding together.
Electron Dot Notation/Lewis Structure Diagrams that show the bonding between atoms of a molecules and the lone pairs of electrons that may exist in the molecule.
Structural Formula A graphic representation of the molecule structure, showing how the atoms are arranged.
Single Bond/Covalent Bond The chemical bond that involves the sharing of electron pairs between atoms. blue (nonmetal) - blue (nonmetal) = covalent bond
Multiple Bond A bond where two or more electron pairs are shared between atoms.
Resonance A method of describing the delocalized electrons in some molecules where the bonding cannot be explicitly expressed by a Lewis Structure.
* Ionic Compounds A chemical compound in which ions are held together in a lattice structure by ionic bonds.
Formula Unit The empirical formula of any ionic or covalent network.
Lattice Energy A measure of the strength of bonds in an ionic compound.
Polyatomic Ion A charged particle which has 2 or more atoms held together by covalent bonds.
Metallic Bond The type of chemical bond formed between atoms in a metallic element, formed by the valence electrons moving freely through the metal lattice.
Malleability Quality of something that can be shaped into something else without breaking, i.e. hammering or rolling.
Ductility A solid material's ability to deform under stress, i.e. being stretched into wire.
VSEPR (Valence Shell Electron Pair Repulsion Theory) Model in chemistry used to predict the shape of individual molecules based on the extent of electron-pair electrostatic repulsion.
Hybridization The concept of mixing atomic orbitals into new hybrid orbitals suitable for the pairing of electrons to form chemical bonds.
Hybrid Orbitals Atomic orbitals tat result when two or more atomic orbitals of an isolate atom mix.
Dipole The separation of charges within a molecule between two covalently bonds atoms.
Hydrogen Bonding A chemical bond in which a hydrogen atom of one molecule is attracted to an electronegative atom (Ni, O, F) usually of another molecule.
London Dispersion Forces Weakest intermolecular force; Temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles.
Intermolecular Forces Forces of attraction or repulsion which act between neighboring particles.
Intramolecular Forces Any force that hold together the atoms making up a molecular compound.
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