Periodic group

Chlorine The element chlorine is located in the 7th group in the periodic table it is the symbol for CI. Chlorine is a chemical element it has a atomic mass of 35. Chlorine has 17 protons, 18 neutrons, and 17 electrons. The electron configuration for chlorine is 3s2-3p5. Chlorine has a boiling point of 3.16, and is family with halogen. Chlorine was discovered in 1774 by Carl Wilhelm Scheele. He obtained it through the reaction of the mineral pyrolusite manganese dioxide with hydrochloric acid. Carl Wilhelm Scheele thought that chlorine contained gas. They confirmed chlorine in 1810, and that’s when they also named the element. Chlorine has a boiling point where it starts to vaporize. Chlorines critical density is the critical pressure and temperature. Chlorine has a critical pressure, critical volume, and a density. Chlorine has a normal phase of gas at 32F, and it also has a vapor pressure at 32F.…

What is a Periodic Table and what is it used for in science and our everyday lives? On entering the chemistry laboratory at Mercer University, for Science 100 a large colorful chart displaying rows and columns of cells, was hanging over the chalkboard. I immediately felt a bit intimidated and my heart began racing. I questioned myself as to what am I about to experience? Moving closer to examine the chart, I felt as if the bright colors on the chart were generating warmth (energy) and…

addition, observe arrangements and trends on the periodic table. Finally, the main goal is to draw conclusions and identify the locations of unknown elements based on given trends and properties. Through observing characteristics and trends, one is introduced to reading the periodic table and its elements, based on how it is arranged. Dmitri Mendeleev was a Russian scientist who is credited with creating the first periodic table. The Russian scientist’s first table included missing, unknown…

The periodic table we know today is very organized and accurate. It shows all of the elements that have been discovered and has them arranged and by their chemical properties, atomic masses, and electron configurations. In order to construct the periodic table, every element had to be discovered. Elements such as gold, tin, lead, and copper have been widely known and used since ancient times, however, the first discovery of an element wasn’t made until 1649 by Hennig Brand when he discovered…

knowledge of the periodic table to determine the identity and physical properties of each unknown element. To find the unknown elements we looked at the characteristics of the other elements and grouped the ones that were similar and belonged in the same column. By looking at the characteristics of the unknown elements if it seemed to belong in a group with others with a blank we assumed it belonged there. Mendeleev was a scientist who came up with the original periodic table which he founded…

The periodic table had been a key factor in many ways to finding new elements, like scandium, silicon, and neon. It has shown new ways those elements could help us by predicting certain elements reactions. While Dimitri Ivanovich Mendeleev is considered to be the creator of the periodic table, there were many contributions that helped the creation of the useful graph be achieved. Between 1817 and 1829 Johann Dobereiner was grouping elements with similar properties into groups of threes,…

The purpose of this lab is to understand how the elements in similar groups are together because of similar properties the elements share. Like Mendeleev, we had made connections toward the creation of the periodic table. When finding the unknown elements we used other known elements as guides and looked for similar properties. Like the Periodic Table today, it is organized through similar properties of each element and categorized in groups. Dimitri Mendeleev was a chemist from Russia who lived…

He is known for his work on the Periodic Law and the creation of the very first periodic table. Mendeleev dedicated many years of his life to collecting information about all the 63 elements that had been discovered during his time. Mendeleev had noticed that there were groups of different elements with very similar atomic masses and other chemical properties. Mendeleev had created the periodic law which is a law stating that the elements, when listed in order of their atomic numbers, fall into…

proposed a “periodic table of elements” on the base of periodic repetition of properties. In 1864, before Mendeleev, and John Newlands arranged the elements in order of atomic mass where every eight elements has similar properties. He called the relationship “the law of octaves”. Even so, this law could not be applied for the elements beyond Calcium, so it was not accepted by the scientific community. The modern periodic table is thought to be the outermost ground-state electron configuration…

chemist who invented the first periodic table in 1869. The periodic table he made was very different from the modern day periodic table we know today. Henry Moseley updated Mendeleev's version of the periodic table in 1915. This is more like the periodic table that we know and use today. The only difference is that there has been many more elements added. Mendeleeve also had predicted a lot of the characteristics and properties of elements that would fill up some of the spaces that he left…