Homework Today (Friday) is to watch another of these excellent REview/PREview videos; this one is on the electron and the atomic model. One thing I did not cover in class is the relationship between electrons and light, which would be particularly useful to understand Mabel and Abigail's chemagic demonstrations. Like last period, so that I know you have done your homework, write one sentence stating an important point from the video, and leave that, along with your name, in the COMMENTS below. I noticed only 4 people left comments last homework.
Unit 3: Atoms and Light—Exploring Atomic and Electronic Structure
Connor: Spectroscopy is the process of identifying elements based on unique spectra by comparing data and using several different techniques. It is used the determine the chemical composition of of stars, and astrophysicists (astrochemistry is the study of molecules and elements in the universe, how they react with light, and how they react with each other) use light to study the universe because the environments they wish to study are far away and/or inhospitable for people or instruments (such as the sun's surface.) Based on the wavelength of light they are able to identify what elements they are looking at. Wavelength is the measuring of a distance, and that distance is between the peak in oscillation of the light. The electromagnetic spectrum is important because it allows astrophysicists and other scientists to tell what elements are actually present in the objects they study. Based on the wavelength of light, they are able to see the elements and substances they are looking at. ((This was an interesting video, I liked it))
ReplyDeleteColor is important in identifying elements. Chemists have used the properties of atoms to study the structure of our world and worlds far away.Today scientists are using the powerful connection between light and electrons to explore molecules and atoms across our galaxy. With the knowledge of atomic and electronic structure chemists can understand the properties and patterns of elements.
ReplyDelete-Laura
Green Fireworks are made of barium, Red fireworks are made of lithium calcium and Stronium
ReplyDeleteScientists are using the powerful connection between light and electrons to explore molecules and atoms across our galaxy. With a knowledge of atomic and electronic structure, chemists can understand the properties and patterns of elements that comprise our world.
ReplyDelete-Zachary
An x-ray fluorescence device hits the atoms in a metal sample, nocking out some of the electrons close to the nucleus and creating an unstable situation for the atom. The outer electrons will then move in and take the missing electrons' spots. The energy created by this is released from the atom as a secondary x-ray, which then can be picked up by the x-ray fluorescence device. The device then can tell what the metal sample is composed of.
ReplyDelete- Niles
Scientists like J. J. Thompson discovered cathode rays by creating a vacuum in a bottle.
ReplyDelete-MD
ReplyDeleteUsing x-ray waves and energy, scientists are able to determine what something, for example, metal, is made out of.
ReplyDelete- Abigail Miller
Spectroscopy is the study of the interaction between matter and electromagnetic radiation.[1][2] Historically, spectroscopy originated through the study of visible light dispersed according to its wavelength, by a prism. Later the concept was expanded greatly to comprise any interaction with radioactive energy as a function of its wavelength or frequency. Spectroscopic data is often represented by a spectrum, a plot of the response of interest as a function of wavelength or frequency.
ReplyDelete~MABEL~
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ReplyDeleteThe spectroscope is a tool originally used by Sir Isaac Newton. In 1666
ReplyDeleteNewton used a prism to split sunlight into its many colors. His experiments
established that most light we see is made up of many different
wavelengths or colors.
He introduced the term “spectrum” to describe the array of colors that
make up visible light. This was the first step toward using light as a tool for
exploring the atom.