• Week 3-4 Chemistry Vocabulary

     

    1.    Metallic bonding - the chemical bond characteristic of metals, in which mobile valence electrons are shared among atoms in a usually stable crystalline structure

    2.    Malleability – the ability to be hammered or beaten into thin sheets

    3.    Ductility – the ability to be pulled into wire

    4.    Lewis formulas - a graphical representation of the outer electrons of bonded elements

    5.    Single bond – a pair of electrons (one from each atom) that is shared between two atoms, often represented by a long dash

    6.    Double bond two pairs of electrons (one from each atom) that is shared between two atoms, often represented by two long dashes

    7.    Triple bond – three pairs of electrons (one from each atom) that is shared between two atoms, often represented by three long dashes

    8.    Lone pair – an unshared pair of electrons that belong to one atom

     
     

    Week 3-5 Chemistry Vocabulary

     

    1.    VSEPR theory – Valence Shell Electron Pair Repulsion - states the repulsion between the sets of valence electrons surrounding an atom causes these sets to be oriented as far apart as possible.

    2.    Polar covalent bond – a type of bond that forms when electrons are not shared equally.

    3.    Non-polar covalent bond - a type of bond that forms when electrons are shared equally.

    4.    Mole – the SI base unit used to measure the amount of a substance. One mole is the amount of a pure substance that contains 6.02 X 1023 representative particles

    5.    Avogadro’s number – the number 6.02 X 1023 which is the number of representative particles in a mole.  Named in honor of Amedeo Avogadro.

    6.    Molar mass – the mass in grams of one mole of any pure substance.

    7.    Dimensional analysis – a systematic approach to problem solving that uses conversion factors to move from one unit to another.

    8.    Atomic mass unit – a mass exactly equal to 1/12 the mass of one carbon-12 atom.

    9.    Molecular mass – the sum of the atomic masses in the molecule.