var presentation = ["<word>Atoms<\/word>","<word>sticking together<\/word>","<word>molecules<\/word>","<word>crystals<\/word>","<word>bonded with one another<\/word>","<word>chemical bond<\/word>","<word>visualized<\/word>","<word>multipole balance<\/word>","<word>positive charges in the nuclei<\/word>","<word>negative charges oscillating about them<\/word>","<word>energies<\/word>","<word>distributions<\/word>","<word>characterize the availability<\/word>","<word>electron to bond to another atom<\/word>","<phrase><strong data-readahead=\"Atoms\" class=\"presentation_word\">Atoms<\/strong> <strong data-readahead=\"sticking together\" class=\"presentation_word\">sticking together<\/strong> in <strong data-readahead=\"molecules\" class=\"presentation_word\">molecules<\/strong> or <strong data-readahead=\"crystals\" class=\"presentation_word\">crystals<\/strong> are said to be <strong data-readahead=\"bonded with one another\" class=\"presentation_word\">bonded with one another<\/strong>. A <strong data-readahead=\"chemical bond\" class=\"presentation_word\">chemical bond<\/strong> may be <strong data-readahead=\"visualized\" class=\"presentation_word\">visualized<\/strong> as the <strong data-readahead=\"multipole balance\" class=\"presentation_word\">multipole balance<\/strong> between the <strong data-readahead=\"positive charges in the nuclei\" class=\"presentation_word\">positive charges in the nuclei<\/strong> and the <strong data-readahead=\"negative charges oscillating about them\" class=\"presentation_word\">negative charges oscillating about them<\/strong>. More than simple attraction and repulsion, the <strong data-readahead=\"energies\" class=\"presentation_word\">energies<\/strong> and <strong data-readahead=\"distributions\" class=\"presentation_word\">distributions<\/strong> <strong data-readahead=\"characterize the availability\" class=\"presentation_word\">characterize the availability<\/strong> of an <strong data-readahead=\"electron to bond to another atom\" class=\"presentation_word\">electron to bond to another atom<\/strong>.<\/phrase>","<word>chemical bond<\/word>","<word>covalent bond<\/word>","<word>ionic bond<\/word>","<word>hydrogen bond<\/word>","<word>Van der Waals force<\/word>","<word>create the interactions<\/word>","<word>hold atoms together<\/word>","<word>molecules<\/word>","<word>crystals<\/word>","<word>simple compounds<\/word>","<word>valence bond theory<\/word>","<word>Valence Shell Electron Pair Repulsion model<\/word>","<word>oxidation number<\/word>","<word>explain<\/word>","<word>molecular structure<\/word>","<word>composition<\/word>","<phrase>A <strong data-readahead=\"chemical bond\" class=\"presentation_word\">chemical bond<\/strong> can be a <strong data-readahead=\"covalent bond\" class=\"presentation_word\">covalent bond<\/strong>, an <strong data-readahead=\"ionic bond\" class=\"presentation_word\">ionic bond<\/strong>, a <strong data-readahead=\"hydrogen bond\" class=\"presentation_word\">hydrogen bond<\/strong> or just because of <strong data-readahead=\"Van der Waals force\" class=\"presentation_word\">Van der Waals force<\/strong>. Each of these kinds of bonds is ascribed to some potential. These potentials <strong data-readahead=\"create the interactions\" class=\"presentation_word\">create the interactions<\/strong> which <strong data-readahead=\"hold atoms together\" class=\"presentation_word\">hold atoms together<\/strong> in <strong data-readahead=\"molecules\" class=\"presentation_word\">molecules<\/strong> or <strong data-readahead=\"crystals\" class=\"presentation_word\">crystals<\/strong>. In many <strong data-readahead=\"simple compounds\" class=\"presentation_word\">simple compounds<\/strong>, <strong data-readahead=\"valence bond theory\" class=\"presentation_word\">valence bond theory<\/strong>, the <strong data-readahead=\"Valence Shell Electron Pair Repulsion model\" class=\"presentation_word\">Valence Shell Electron Pair Repulsion model<\/strong> (VSEPR), and the concept of <strong data-readahead=\"oxidation number\" class=\"presentation_word\">oxidation number<\/strong> can be used to <strong data-readahead=\"explain\" class=\"presentation_word\">explain<\/strong> <strong data-readahead=\"molecular structure\" class=\"presentation_word\">molecular structure<\/strong> and <strong data-readahead=\"composition\" class=\"presentation_word\">composition<\/strong>.<\/phrase>","<word>ionic bond<\/word>","<word>formed<\/word>","<word>metal loses one or more of its electrons<\/word>","<word>positively charged<\/word>","<word>cation<\/word>","<word>electrons are then gained<\/word>","<word>non-metal atom<\/word>","<word>negatively charged<\/word>","<word>anion<\/word>","<word>oppositely charged ions<\/word>","<word>attract one another<\/word>","<word>electrostatic force of attraction<\/word>","<word>ions are held together<\/word>","<word>electrostatic attraction<\/word>","<phrase>An <strong data-readahead=\"ionic bond\" class=\"presentation_word\">ionic bond<\/strong> is <strong data-readahead=\"formed\" class=\"presentation_word\">formed<\/strong> when a <strong data-readahead=\"metal loses one or more of its electrons\" class=\"presentation_word\">metal loses one or more of its electrons<\/strong>, becoming a <strong data-readahead=\"positively charged\" class=\"presentation_word\">positively charged<\/strong> <strong data-readahead=\"cation\" class=\"presentation_word\">cation<\/strong>, and the <strong data-readahead=\"electrons are then gained\" class=\"presentation_word\">electrons are then gained<\/strong> by the <strong data-readahead=\"non-metal atom\" class=\"presentation_word\">non-metal atom<\/strong>, becoming a <strong data-readahead=\"negatively charged\" class=\"presentation_word\">negatively charged<\/strong> <strong data-readahead=\"anion\" class=\"presentation_word\">anion<\/strong>. The two <strong data-readahead=\"oppositely charged ions\" class=\"presentation_word\">oppositely charged ions<\/strong> <strong data-readahead=\"attract one another\" class=\"presentation_word\">attract one another<\/strong>, and the <strong data-readahead=\"ionic bond\">ionic bond<\/strong> is the <strong data-readahead=\"electrostatic force of attraction\" class=\"presentation_word\">electrostatic force of attraction<\/strong> between them. For example, sodium (Na), a metal, loses one electron to become an Na+ <strong data-readahead=\"cation\">cation<\/strong> while chlorine (Cl), a non-metal, gains this electron to become Cl\u2212. The <strong data-readahead=\"ions are held together\" class=\"presentation_word\">ions are held together<\/strong> due to <strong data-readahead=\"electrostatic attraction\" class=\"presentation_word\">electrostatic attraction<\/strong>, and that compound sodium chloride (NaCl), or common table salt, is <strong data-readahead=\"formed\">formed<\/strong>.<\/phrase>","<word>covalent bond<\/word>","<word>one or more pairs<\/word>","<word>valence electrons<\/word>","<word>shared by two atoms<\/word>","<word>electrically neutral group of bonded atoms<\/word>","<word>molecule<\/word>","<word>Atoms<\/word>","<word>share valence electrons<\/word>","<word>create a noble gas electron configuration<\/word>","<word>outermost shell<\/word>","<word>Atoms that tend to combine<\/word>","<word>each have eight electrons<\/word>","<word>valence shell<\/word>","<word>follow the octet rule<\/word>","<word>some elements<\/word>","<word>hydrogen<\/word>","<word>lithium<\/word>","<word>need only two electrons<\/word>","<word>attain this stable configuration<\/word>","<word>atoms are said to follow<\/word>","<word>duet rule<\/word>","<word>electron configuration<\/word>","<word>noble gas<\/word>","<word>helium<\/word>","<word>two electrons in its outer shell<\/word>","<phrase>In a <strong data-readahead=\"covalent bond\" class=\"presentation_word\">covalent bond<\/strong>, <strong data-readahead=\"one or more pairs\" class=\"presentation_word\">one or more pairs<\/strong> of <strong data-readahead=\"valence electrons\" class=\"presentation_word\">valence electrons<\/strong> are <strong data-readahead=\"shared by two atoms\" class=\"presentation_word\">shared by two atoms<\/strong>-- the resulting <strong data-readahead=\"electrically neutral group of bonded atoms\" class=\"presentation_word\">electrically neutral group of bonded atoms<\/strong> is termed a <strong data-readahead=\"molecule\" class=\"presentation_word\">molecule<\/strong>. <strong data-readahead=\"Atoms\" class=\"presentation_word\">Atoms<\/strong> will <strong data-readahead=\"share valence electrons\" class=\"presentation_word\">share valence electrons<\/strong> in such a way as to <strong data-readahead=\"create a noble gas electron configuration\" class=\"presentation_word\">create a noble gas electron configuration<\/strong> (eight electrons in their <strong data-readahead=\"outermost shell\" class=\"presentation_word\">outermost shell<\/strong>) for each atom. <strong data-readahead=\"Atoms that tend to combine\" class=\"presentation_word\">Atoms that tend to combine<\/strong> in such a way that they <strong data-readahead=\"each have eight electrons\" class=\"presentation_word\">each have eight electrons<\/strong> in their <strong data-readahead=\"valence shell\" class=\"presentation_word\">valence shell<\/strong> are said to <strong data-readahead=\"follow the octet rule\" class=\"presentation_word\">follow the octet rule<\/strong>. However, <strong data-readahead=\"some elements\" class=\"presentation_word\">some elements<\/strong> like <strong data-readahead=\"hydrogen\" class=\"presentation_word\">hydrogen<\/strong> and <strong data-readahead=\"lithium\" class=\"presentation_word\">lithium<\/strong> <strong data-readahead=\"need only two electrons\" class=\"presentation_word\">need only two electrons<\/strong> in their <strong data-readahead=\"outermost shell\">outermost shell<\/strong> to <strong data-readahead=\"attain this stable configuration\" class=\"presentation_word\">attain this stable configuration<\/strong>; these <strong data-readahead=\"atoms are said to follow\" class=\"presentation_word\">atoms are said to follow<\/strong> the <strong data-readahead=\"duet rule\" class=\"presentation_word\">duet rule<\/strong>, and in this way they are reaching the <strong data-readahead=\"electron configuration\" class=\"presentation_word\">electron configuration<\/strong> of the <strong data-readahead=\"noble gas\" class=\"presentation_word\">noble gas<\/strong> <strong data-readahead=\"helium\" class=\"presentation_word\">helium<\/strong>, which has <strong data-readahead=\"two electrons in its outer shell\" class=\"presentation_word\">two electrons in its outer shell<\/strong>.<\/phrase>"];
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