Elements, Compounds, Mixtures, Atoms and Molecules
25/6
We had our first Chemistry lesson today. We were supposed to do our own research on the topic and find out about it. Then, we were asked to jot down our findings on the board. I partnered with Natalie and Wei Xuan and we did some research on the topic. We discovered about elements, compounds, mixtures, atoms and molecules. The most interesting part of the lesson was when we were writing our findings on the board. I am still wondering about what is the difference between compounds and mixtures. I now know what will happen when elements are put together both physically and chemically. I am still unsure about molecules. Another question that I have is, "Does elements equal to atoms?"
26/6
Today I discovered more about the topic. The most interesting part of the lesson was the part when we were going through worksheets. I am still wondering about what are molecules. Today I learned about what metalloids. I discovered that metalloids are not metals nor non-metals, they have the characteristics of both. I now know what metalloids are. I am still unsure about examples of metalloids. Another question that I have is, "What are some examples of metalloids?"
29/7
Today I discovered about the periodic table. I also learned that the periodic table is separated into metals and non-metals (including metalloids) with the line that looks like a staircase. The most interesting part of the lesson was trying to memorise as much of the periodic table as possible before doing a hort quiz. I am still wondering about what type of metalloids there are. Today I learnt about the periodic table. I discovered that the periodic table is really cool! Today I observed crystalisation. I now know what what the periodic table represents - all the elements in the universe! I am still unsure about some of the elements in the periodic table. Another question that I have is, "What are some of the elements I never knew until today?"
2/7
Today I discovered about metalloids. The most interesting part of the lesson was the quiz. I am still wondering about elements are formed. Another question that I have is, "How are elements formed?" I guess they are probably dug out from the ground as raw materials? I don't know.
3/7
After the Chemistry lessons on Week 1 and Week 2, I have learnt a lot of things I have NEVER known before. Atoms... Elements... Compounds... Mixtures... Molecules... I have really been enlightened. Furthermore, I think that this topic is really exciting and interesting, hence during lesson we are driven to listen in class, thus also ensuring that we don't miss out on the important information.
Today during lesson, we went to the Chemistry Lab to do a practical. I was amazed by how different Chemistry was from Biology. The absence of air-con in the lab... The goggles that had to be put on... The lab coat that had to be worn despite the hot climate of Singapore... I guess all these are safety precautions? Maybe they are afraid that the poisonous fumes will be blown by the air-con into our eyes? The goggles are to prevent chemicals from entering our eyes? The lab coat to protect our skin from being exposed to deadly toxins? Never mind, better safe than sorry.
We did two experiments. One about mixing sulphur and iron filings and the other about which part of the flame is the hottest (measure the time it takes for the copper wire to glow). My favourite part of the lesson was the sulphur and iron filings experiment as it was really cool seeing the two elements mix and how they form a mixture or a compound. I am a hands-on person who always likes to fiddle with stuff, so this type of experiment is the perfect thing for me!
Today I discovered about atoms. I also learned about elements. The most interesting part of the experiment was the hands-on experiment on sulphur and iron fillings. I am still wondering about how the chemical reaction between sulphur and iron fillings occur. Today I experimented with sulphur and iron fillings. My hypothesis was that they will be chemically combined. I concluded that they became a compound after heating. I now know what happened to the sulphur after heating. Today I conducted a science lab on sublimation. Another question that I have is, "How does sublimation take place?"
Today during lesson, we went to the Chemistry Lab to do a practical. I was amazed by how different Chemistry was from Biology. The absence of air-con in the lab... The goggles that had to be put on... The lab coat that had to be worn despite the hot climate of Singapore... I guess all these are safety precautions? Maybe they are afraid that the poisonous fumes will be blown by the air-con into our eyes? The goggles are to prevent chemicals from entering our eyes? The lab coat to protect our skin from being exposed to deadly toxins? Never mind, better safe than sorry.
We did two experiments. One about mixing sulphur and iron filings and the other about which part of the flame is the hottest (measure the time it takes for the copper wire to glow). My favourite part of the lesson was the sulphur and iron filings experiment as it was really cool seeing the two elements mix and how they form a mixture or a compound. I am a hands-on person who always likes to fiddle with stuff, so this type of experiment is the perfect thing for me!
Today I discovered about atoms. I also learned about elements. The most interesting part of the experiment was the hands-on experiment on sulphur and iron fillings. I am still wondering about how the chemical reaction between sulphur and iron fillings occur. Today I experimented with sulphur and iron fillings. My hypothesis was that they will be chemically combined. I concluded that they became a compound after heating. I now know what happened to the sulphur after heating. Today I conducted a science lab on sublimation. Another question that I have is, "How does sublimation take place?"