Problem: Article: In molecular orbital theory, bond order is defined as half of the difference between the number of bonding and antibonding electrons. Bond order = [(Number of electrons in bonding molecules) - (Number of electrons in antibonding molecules)]/2. Each electron that entered a bonding molecular orbital will help stabilize the new molecule. Each electron that entered an antibonding molecular orbital will act to destabilize the new molecule. Note the new energy state as the bond order of the molecule. If the bond order is zero, the molecule cannot form. The higher bond orders indicate greater stability for the new molecule. Hydrogen atoms have one electron in the s shell, and the s shell is capable of holding two electrons. When two hydrogen atoms bond together, each completes the s shell of the other. Two bonding orbitals are formed. No electrons are forced to move to the next higher orbital, the p shell so no antibonding orbitals are formed. The bonding order is thus (20)/2{\displaystyle (2-0)/2}, which equals 1. This forms the common molecule H2: hydrogen gas.
Summary: Know the formula. Know that the higher the bond order, the more stable the molecule. Consider a simple example.

INPUT ARTICLE: Article: Use either hyphens or forward slashes to conform with the most common methods for separating numerals. Choose periods or bullets for a more stylized version. If none of these options are available for including a date in a filename, try underscores instead. The twenty-third of November could be written out in any of the following formats in American English: 11-23-03 11/23/03 11.23.03 11_23_03 Stick with hyphens for the International Standard. The same date would be written as 2003-23-11 in this format. When writing dates numerically, add a "0" before January through September and the first through the ninth day of the month. This is often required in forms but you can use it to make your own list of dates visually neater. It will make all of your numerical dates the same length and will allow for correct data sorting. For instance, you could use either 3/2/15 or 03/02/15. In a list of dates, 03/02/15 would be the same length as 12/02/15. If you use 3/2/15 in your list, the earlier date may incorrectly be sorted after the later date. This happens because the first digit in the March date (3) is larger than the first digit in the December date (1). Add a "0" to prevent this error. When you're asked to provide a date on a form, you'll often see something like MM/DD/YY or DD-MM-YYYY. These letters indicate how many numerals you should include and in what order. "MM" stands for a 2-digit month and "DD" suggests a 2-digit day. "YY" indicates you should include the last 2 digits of the year, while "YYYY" means you must include all 4 digits. Use a "0" before single-digit days and months as needed. If you're asked to provide the date as MM/DD/YY you could write 05/12/94. If you're asked for DD-MM-YYYY, this date would be 12-05-1994. You may see these letters without any separation on some forms. For DDMMYY, simply enter 120594 unless otherwise noted.

SUMMARY: Separate the month, day, and year with slashes or hyphens. Include an optional "0" before single-digit month and day numbers. Use numerals when you see "MM," "DD," and "YY" or "YYYY" on a form.

In one sentence, describe what the following article is about: Thread your needle with matching, lightweight thread, and sew straight across your hem roughly 1/4 inch (6 mm) away from the raw edge. After sewing this line, trim the edge so that there is only 1/8 inch (3 mm) between the thread line and the raw edge. This stitch will end up being on the bottom of your hem. It should help you maintain an even, consistent roll. Fold the raw edge toward the wrong side of the fabric and press in place using an iron. While not entirely necessary, pressing the fold in place will make the hem less likely to unroll as you stitch. Fold the fabric so that the bend falls just past your initial row of stitching. You should see your initial stitching along the underside of the fabric but not from the front. Pick up one thread from the fabric and a small stitch from the edge of your fold. Pull the needle through, but do not pull it taut just yet. Use a small, sharp needle for best results. Doing so will make it easier to pick up single threads along your hem. The stitch made into your fold should be as close to the actual fold as possible. Position it in between your initial line of stitching and the fold itself. The threads you pick up from the front of the actual fabric should be directly above the stitch made into your fold. These threads should also be right above the raw edge. Make sure that you only pick up one or two threads from the fabric. Picking up more will cause the hem to be more visible from the front of the fabric. Each stitch should only pick up one or two threads from the fabric, and the stitches should be spaced roughly 1/4 inch (6 mm) apart. Repeat this until you have 1 to 2 inches (2.5 to 5 cm) of hem stitching. Lightly pull on the thread in the direction of your stitching. The raw edge should roll itself down into your hem, disappearing from sight. Use firm pressure, but do not pull tightly. Pulling too tightly can cause the fabric to bunch up. Smooth out any bubbles or bumps with your fingers. Continue stitching along the rest of the hem in the same manner until you reach the end. Knot off the end and cut off any excess thread. As you get better at the process, you can pull the thread after 4 to 5 inches (10 to 13 cm) of stitching rather than every 1 to 2 inches (2.5 to 5 cm). If completed correctly, the raw edge should be hidden along the wrong side of the fabric and the hem stitching should be barely visible from the front. The hem may already be smooth enough, but if desired, use an iron to press it further. This step completes the process.
Summary:
Sew straight across the raw edge. Fold in the raw edge. Pick up a few threads with your sewing needle. Make a few more stitches in the same manner. Pull the thread through. Repeat along the length of the hem. Iron press when finished.