Blog Week 24

On Monday talked about an experiment, we did a stimulation on the internet of rubbing a balloon on a sweater and seeing if it attracts to the wall and sweater. When the balloon was rubbed against the sweater, the balloon took the negative charges through static friction. The balloon got a negative charge and the sweater is now a positive charge and the wall has a neutral charge. The balloon was attracted to the sweater because they had opposite charges. The balloon was also attracted to the wall, but it was a very small attraction, because the wall had a neutral charge. This picture below shows the balloon attraction to the sweater and the wall.

We then learned some terms. Neutral has equal (+) and (-), evenly distributed charge. Charged is unequal (+) and (-) charge. Polar is equal (+) and (-), but uneven distribution. Dipole are organized charges at different ends, they are exact opposites. We also learned that the only charges that move are negative charges. Tomorrow we are learning about how charges have to do with compounds. On Tuesday, we talked about dipoles. We found out that H2O are dipole atoms. Which means that oxygen has a slightly negative charge and hydrogen has a slightly positive charge. So when two H2O atoms are by each other the oxygen attracts to the hydrogen molecules. The structure that it makes is called a crystal lattice structure. Water melting means enough energy to separate the attraction of each molecule between each other. IMFs are intermolecular forces, electrostatic attraction between molecules because of dipoles. IMF is also a dipole interaction involving H atoms in molecules. We then learned that ions are atoms with a charge and an atom that has an unequal amount of (+) and (-) charge and lastly it loses or gains an electron. If Na atom loses an electron then it turns in an ion and becomes a Na+1. If Cl atom gained an electron then it turns into an ion and becomes a Cl-1. We found out that electron carriers are oxygen and NAD+, they transfer electrons to other molecules. To make ionic compounds it would be like this: Na+1<-->Cl-1 = NaCl. On Wednesday, we did a worksheet. I understood question 1-4, but the rest were very difficult. I tweeted out my answers and these pictures show my answers to the questions.

On Thursday, we were to do the worksheets skill practice 19 and chem Quest 19. I worked alone on both worksheets. I understood the answers once I worked backwards on how to find the answer. I hope I have the right idea. I was going to redo the worksheets to practice for the assessment tomorrow. I hope I can understand it enough to do well on the assessment. Also, I tweeted my answers to both worksheets. On Friday, we took an assessment. I felt like I did pretty good, I understood almost all of it. I hope I did good.