Lab 9: Electron Charges

Sketch the electron dot structure for the following elements (ask about the easy way to find the valence electrons):

items presently in solid form in the lab kit or purchased separately for this laboratory

1. The development of MRI imaging technology is one useful spinoff of basic research into the structure of the atom. Research, however, is expensive. Many people argue that the high cost of research outweighs its potential benefits. Provide one argument for, and one argument against increasing current funding for atomic structure research. Use specific examples from this lesson in your answer to support each position. (6marks)

Directions: There are eight (8) activities in this lab. Please be sure to complete them all. For all questions, type your answers into the yellow box ____ (including your name above) it will expand as you write.

An anode is the negatively charged electrode that loses electrons and also where oxidation takes place.

33. Electron dot model is a way of representing the valence electron of an atom.

Evening help sessions: Wednesdays 5:00-6:30 p.m. in Hancock 209 beginning on September 4. ON WEEKS WHEN THERE IS A TUESDAY TEST, THE HELP SESSION WILL BE ON MONDAY INSTEAD OF WEDNESDAY AND WILL BE HELD FROM 7:00-8:30 IN ENGEL 223. Attendance at Help Sessions is entirely optional but can be helpful.

One of these properties is called an electrical charge. Protons have a "positive" (+) charge, electrons have a "negative" (-) charge, and neutrons have no charge, they are neutral.

During the Atomic line emission lab assignment, my results came out pretty accurate. During the 5th lab it was very fatiguing to determine what the colors were that I had seen. Basically there was a large amount of red. As I went down the line there was a decrease of the rest of the colors, meaning there was more of the red than any other color. As a group we realized this lab emission was a lot like Ge or Germanium based on the spectrum. The first Lab we saw that it was a lot similar to Ce which was Cerium, it is very common to Germanium. With both labs five and 1, you had all the colors except there was no green or violet. Ge had every color except for violet. Our eyes are sensitive to different wavelengths of visible light and we see these

When observing the electric bill, the three concepts that I learned from Chapter Seven: Electricity and Magnetism, is electrical power, electric potential, and Ohm’s Law.

The symbol for Zinc is “Zn” using the first and third letter of the word. The atomic mass of this fairly new element. This new element was first discovered in 1746, and also discovered by Andreas Marggraf. Now scientist have discovered it. The atomic number is 30, which means that the element has 30 electrons and protons. The atomic number of any element is the number of electrons and protons.

Additionally, the electronegativity values for all elements is sometimes seen on some periodic tables. Electronegativity increases from left to right because the elements will have a less filled valence shell, which means less energy is used to lose an electron rather than trying to gain one. While if the valence shell is more full, it would be the opposite, so it would be easier to gain electrons than lose some. From top to bottom, the electronegativity would decrease because down the group, there is more distance between the valence electrons and

This document is not meant to be a substitute for a formal laboratory report. The Lab Report Assistant is simply a summary of the experiment’s questions, diagrams if needed, and data tables that should be addressed in a formal lab report. The intent is to facilitate students’ writing of lab reports by providing this information in an editable file which can be sent to an instructor.

In the nucleus of an atom there are protons and neutrons the number of protons and neutrons depends on the element and ,if it is an isotope of that element. E.g. carbon 12, carbon 12 has six neutrons six protons and 6 electrons . Electrons are located around the nucleus of the atom. Electrons are in shells, the shell closest to the nucleus is 1 , the one after 2 and so on. Each shell can only hold up to a certain number of electrons . the first can hold up to 2 , the second 8 (2+6) the third up to 18 (2+6+10). The general formula for finding out how many electrons a shell can hold is 2n^2. Electrons have a negative charge , while protons have a positive and neutrons have no charge. A atom has the same number of protons and electrons. An ion is formed when an atom loses or gains a electrons .

Cations take electrons so they are shown as a rectangle with an indent which symbolizes a slot for an electron to be taken. If they require multiple electrons to be given to them, they are shown as a rectangle with multiple indents, one for each needed electron. Anions give electrons so they are shown as a rectangle with a tab which symbolizes an extra electron that they want to give away. If the anion have multiple electrons to give away it is shown as a rectangle with multiple tabs on it, one for each electron to give away. The tabs from the anions would fit into the indent of the cations and it would form a rectangle with no tabs or indents as they have no more electrons to giveaway and does not have the need to take any more. If there are tabs on the piece of paper, it must be a cation (giving off a negative charge).