Problem: Article: The bond created by your glue on the front of your puzzle should allow you to easily pick up the puzzle by hand and turn it so the cardboard side of the puzzle is facing up. Larger puzzles can sometimes be more unstable. In this case, you might want to use a piece of cardboard or stiff card stock under the puzzle to provide stability while flipping. Glue can often seep between the spaces between puzzle pieces. When this happens, gently peel the puzzle free of the wax paper before flipping it. For especially stubborn glue, you might need to use a firm plastic edge, like a spatula, to break the bond between the puzzle and the parchment paper. Use firm but gentle pressure when doing this. After you flip your puzzle, you should reinsert parchment paper beneath it to prevent glue from sticking pieces to your work surface. Add a moderate amount of glue to the center of your puzzle and spread a thin layer toward the edges using your paint brush or sponge. Much like when gluing the front of your puzzle, you should aim for a thin, even coat of glue. You should add glue to your puzzle a little bit at a time to prevent wasting glue and to ensure a thin, even coating over the pieces. Once you reach the outer edges of your puzzle, you'll likely have some extra glue left over. Use your paintbrush or sponge to push this glue off the edges of the puzzle and onto the parchment paper. Once the glue on the back of your puzzle is fully dry, your puzzle should be firmly connected together. In many cases, this will be stable enough that you won't have to worry about framing or mounting your puzzle if displaying it on a flat surface. However, framing or mounting your puzzle can provide even more stability to puzzles you plan to hang.
Summary: Flip your puzzle. Glue your puzzle from the center out. Push excess glue off the edges of the puzzle. Allow the glue to fully dry.

Problem: Article: Ionic compounds contain a metal and a nonmetal. Refer to the periodic table of elements to see what categories the elements in the compound belong to. For a two element ionic compound, the naming is simple. The first part of the name is the name of the metal element. The second part is the name of the nonmetal element, with the suffix "-ide." Here are some examples: Al2O3. Al2 = Aluminium; O3 = Oxygen. So the name would be "aluminium oxide." FeCl3. Fe = Iron; Cl3 = Chlorine. So the name would be "iron chloride." SnO2. Sn = Tin; O2 = Oxygen. So the name of this compound would be Tin Oxide. Metals in the D and F blocks of the periodic table are known as transition metals. Their charge is written with a Roman numeral when writing out the compound name. This is because they can have more than one charge and make more than one compound. Example: FeCl2 and FeCl3. Fe = Iron; Cl2 = Chloride -2; Cl3 = Chloride -3. The names would be iron(II) chloride and iron(III) chloride.
Summary: Know what makes a compound ionic. Build the name. Recognize and name transition metals.

Problem: Article: Sit down with your legs in the criss-cross (applesauce) position. Make sure your butt is stable on the ground and your back is straight. If you're a little more flexible and want to do the lotus position, take your right foot and place it on your left thigh and lift your left foot onto your right thigh. If you have a knee problem, place bolsters or blankets beneath your knees so they don't get strained. If you have a back problem and can't sit up straight, lean against pillows or blankets to find a comfortable semi-upright position. As long as your spine is straight, you're good to go! Yoga meditation should not be done lying down. Although this is a relaxing position, it encourages sleep rather than concentration. Simply rest your palms face down on your knees with your fingers relaxed. If you're more comfortable with them in your lap, that's an option too. To do this with some monkish style, layer your fingers on one hand on top of the fingers on your other hand with your palms facing up. Set them in your lap up against your body and press the tips of your thumbs together to make a triangle. If you'd like, try the wisdom seal position by placing your hands palms-up on your knees and holding your thumb and index finger together. Take a deep inhale into your belly and half-speak, half-sing the mantra "OM" (which is pronounced "ohm" or "aum"). Sustain the mantra for as long as you can as you exhale. This mantra is thought to focus on purification and dissolving negativity. Inhale through your nose all the way into the bottom of your belly. Take note of your belly extending and contracting as you inhale and exhaleyour shoulders shouldn't move up and down. As you do this, you might think to yourself, "breathing in, I calm my mind and body, breathing out, I smile to my body." If you like a more structured approach, try inhaling slowly for 8 counts, holding your breath for 8 counts, and exhaling for 8 counts. There's no right way to breathe in meditation so find what works for you. If you feel strained or lightheaded from breathing a certain way, try a different way. After you become familiar with basic breathing techniques, you can practice yogic styles of breathing that energize the body (like bhastrika or kapalabhati).
Summary:
Sit on your mat with your legs crossed or assume the lotus position. Place your hands on top of your knees or put your hands in your lap. Chant the "OM" mantra 5 to 10 times if you desire. Breathe from your diaphragm, focusing on each inhale and exhale.