4.) I noticed that there is a relationship between the ionic radius and the atomic number of the representative elements in Group 1A. The higher the atomic number, the bigger the ionic radius is. So, while hydrogen has an atomic number of 1 and Francium has an atomic number of 87, it is safe to assume that FR has a higher ionic radius. This is true; the ionic radius for Hydrogen is 0.012, and for Francium, it is 0.194.
Question # 1: Part A How many electrons and protons in an atom of vanadium? Answer # 1: Atomic number = number of protons = 23 Mass number = number of protons + neutrons Mass number = 51 g/mole Number of neutrons = 51-23 Number of Neutrons = 28 Number of electrons = atomic number = 23 Question
The drum major’s voice rings out, sharp and clear in the tense silence. We hear her call us to set, and we freeze. The band is across the field, standing a block, every member leaning forward, forming the same angle towards the ground. We are lined up from the 35 yard line to the 45, lying on the wet grass as if we are asleep. We are perfectly still, then suddenly we rise, kicking our legs in unison.
The Radium Girls were female factory workers who contracted radiation poisoning from painting watch dials with luminous paint at the United States Radium factory in Orange, New Jersey, around 1917.’This statement/expiations was from the article called,” Radium Girls” from the wed cite https://en.wikipedia.org/wiki/Radium_Girls. The radium girl where started during the 1920’s when a” wristwatch with a glow-in-the-dark dial” (this is from the article called Mae Keane, One Of The Last 'Radium Girls,' Dies At 107 found in the link below.) Radium is a glowed and fizzed substance. Mae Keane from the article ‘Mae Keane, One Of The Last 'Radium Girls,' Dies At 107’ she say, ‘… she didn't like the taste of the radium paint. It was gritty’.
and and Colorguard have been practicing constantly, and achieved many awards during the last few parades. The members of Colorguard and Band have been working their tails off every day to ensure more achievements in the future. Band members have been practicing everyday to get everything right. They start practice at 7:40 a.m, and play through the first period of the day with another period for Concert Band and after-school practices until 9 p.m. To get prepared for competitions, they all must arrive on time and do the visual and music parts of their warm-ups.
Copper is a chemical element with the symbol Cu and atomic number twenty-nine. It is also a solid at room temperature. Copper was most likely the first element ever manipulated by humans. In fact, humans discovered copper during the Paleolithic era. Copper was also very important during the copper and bronze age.
Tonya Gusevik HIST102 Dr. Lupo August 16, 2015 The Manhattan Project The Manhattan Project is a short history of the beginning of the Atomic Bomb program during World War II. Nuclear research all started when the Japanese bombed Pearl Harbor, and the United States entered into World War II. Scientific development began in the years prior to the war. The program started in 1939 and grew to employ more than 130,000 people.
Introduction - Some car owners go their entire driving lives relying on the predetermined octane level of whatever kind of gasoline they use. These people don’t get the most out of their engines. If you want to see exactly what your car is capable of, you should experiment with octane booster additives. What Is Octane? - Have you ever wondered what those little numbers on gas station pumps are there for? 87. 89.
Encomium Essay Someone that has inspired me to be who I am to this day is my mom Mirna Castellon and I’m going to explain why I praise her for everything she has done for me. A little background on my mom she’s is original from San Salvador, El Salvador. At the time San Salvador where she lived was a really poor place and the Salvadoran civil war was happening also well. My mom was raised during the civil war and she became a strong woman from this experienced that happen to her.
William Ramsey and M.W. Travers discovered Neon in 1898. The first person to invent a neon lamp was Georges Claude. Georges Claude displayed the first neon lamp to the public on December 11, 1910. In 1923 Georges and his French company Claude Neon introduced neon gas signs to the United States. Neon is a noble gas that produced a colored glow when excited by electricity passing through a glass tube in which the gas is confined and it produced a reddish orange color.
The Atomic Age, also known as the Atomic Era, is the period of history following the detonation of the atomic bomb. On August 6, 1945, the U.S Army Air Forces unleashed a uranium fission bomb over the Japanese city of Hiroshima, killing about 140,000 people. Three days later, on August 9th, the U.S. Army Air Forces detonated a plutonium fission bomb codenamed “Fat Man” over the Japanese city of Nagasaki, killing about 80,000 people. The results of both detonations were devastating as approximately 200,000 civilizations and military personnel were killed. It has been 70 years since those fatal bombings and not one sitting American president has been to either Hiroshima or Nagasaki, until now.
People thought that the north star was the brightest star in the universe. When we had slavery the slaves would follow the north star which was quite noticeable, considering people thought it was the brightest. Although, people may have gotten the North Star confused with other stars, people still believed it was the brightest. People believed that the north star was the brightest star because they got it confused with the dog star, (Alpha Canis Majoris). Stars have different magnitudes, so if the north star had a magnitude of below -1 it would be brightest then a star with a magnitude of above 0.
“In 1775, more than a million pounds of indigo was exported from South Carolina to England” (Indigo’s Political, Economic, Cultural History 1). This massive amount of dye being traded was due to many factors that made it nearly the perfect trade commodity. The process of indigo dye being made by slaves in South Carolina in the 1700s is shown very well in the book Someone Knows My Name by Lawrence Hill. The production of this indigo dye has an extensive history of being extremely arduous to produce naturally, but results in a compact substance that will last a long period of time and be very valuable.
A dye is a coloured substance that has an affinity, a bond with a physical surface, to the substrate to which it is being applied. Dyes are usually soluble in water. Dyes are used to change the perceived colour of an object. Dyes consist of 2 main parts: chromohore and auxochrome. Before 1856, all dyes were obtained from natural resources.
