Chemthink bond notes PDF

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Ionic and covalent bonds from ChemThink...

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Covalent bonds – ChemThink PBS Covalent Bonding Slide 1 - Covalent bonds _________ electrons Slide 2 - what are those moving black dots supposed to be? What are the orange centers? Is this an accurate representation of the MOVEMENT of subatomic particles? Is this an accurate representation of the relative SIZE of those 2 particles? Slide 2 - Move them close, now grab one and move it slowly away. What happens? Slide 3 - can you keep moving the atoms until they touch? Slide 5 - what does the line represent? The atoms had to get __________ for the electrons to be attracted to the other nucleus. When they get close enough, __________atoms are attacting _________ electrons Slide 8 - and the other atom is _________ attracting both electrons Slide 9 Actually, the atoms are ___________ over the electrons because they both want them! This ________________________________________________ Slide 11 - which region of periodic table are atoms that attract electrons the most strongly? Click it on the screen On the last column, click it. What did the slide say? And why don't metals form covalent bonds?

Slide 12 - Covalent bonds are between ___________ and __________ To the _________ of the stair-step, but NOT the last column slide 13 - what about hydrogen? Slide 18 - the most STABLE molecule is when the potential energy is the _______________ slide 19 - they are ________ stable bonded than when they are apart slide 20 - to be more stable is to be ___________ in energy slide 21 - in chemistry the line between H-H represents _____ electrons, not just one slide 22 - two lines, like O=O, means there are _____ pairs of electrons being shared, or ________ total electrons in those 2 lines slide 23: The highest and strongest bond is the triple bond. It is shown by ______ lines or ______ pairs of electrons, or _____ electrons in total slide 24 - the weakest (easiest to break) bond is the _______ bond The strongest bond is the ________ bond We don't have _________ _________ triple bonds STOP Covalent Bonds here Ionic Bonds – Chemthink pbs Ionic bonding What happened when you pulled the ions together in slide #2? What happened slide #3? Slide 5 - in order to build an ionic compound that sticks together, you need: ____________ Slide 6 - Which side on Periodic table are the POSITIVE Ions? The positive ions go from the ____ to the ___ on the periodic table. Slide 7 - if an atom gains electrons, it becomes _____

These atoms are found on the ____________ side of the table What did the mnemonic M&N stand for? Slide 8 - Metals make _________ ions and non-metals make _________ ions. So an ____________ bond is created when metals join with NON metals On slide 9, are the two elements close together on the periodic table, or are they on opposite sides? Which atom is TAKING electrons? So ______________ always GIVE AWAY their electrons. Slide 10 - Which atom becomes a cation? Which atom becomes an anion? slide 11 - why did the sodium atom shrink in size? slide 11 - an ionic bond is: What did you see happen in slide 17? Slide 18 - Ionic bonds make ___________ Do Ionic bonds have molecules? Slide 21 - how many did you count? Slide 22 - What is the chemical FORMULA for salt? Slide 23 - Ionic crystals contain ______ molecules Slide 24 - remember chemicals combine in simple, whole number ratios how many calcium atoms did you count? How many fluorides? So the formula is (remember the subscript)? [It won't let you move forward until you get it right, ask if you get stuck] Slide 26 - why do ions stick together?...