Periodic group

theory about periodic trends. We put these 3 metals through different tests to show why elements in similar group and period react differently. The purpose for this lab is to test the idea of patterns in the periodic trend, and if elements in similar group or similar period react differently due to the trend that they follow. If two elements in the same group or family are to be tested, one of the element reactivity will be slightly different from the other. This is the work of the periodic…

History of the periodic table of elements The periodic table of elements is an organized table of all chemical elements identified and recognized. Most forms of the table commonly include information such as each element’s atomic number, chemical properties, and electron configuration. Prior to the periodic table, the elements were arranged in groups of three called triads. These triads were created by Johann Dobereiner, a German chemist, in 1829. Dobereiner arranged these elements in groups of…

analyze and examine periodic trends of the first 36 elements that are on the periodic table. Trends that were analyzed and examined are the atomic radius (AR) and the first ionization energy (IE) of the 36 elements. The hypothesis for this lab was that the elements that are in the groups that had the highest atomic radius would be in the same groups as those who have the the highest first ionization energy and the groups who have the lowest atomic radius would be in the same groups as those…

Discovery and Organization of the Periodic Table In order to understand the periodic table, a basic knowledge in the terminology would be very helpful. A periodic table a chart organizing elements by atomic numbers and chemical properties into groups and periods. The periodic table was created in order to easily find and classify the different elements that are known. Elements are pure substances composed of just one type of atom that cannot be broken down into anything simpler by ordinary…

The basis of Mendeleev’s periodic table was categorizing the elements according to their physical and chemical characteristics with regard to their atomic weights. Mendeleev was the first to come up with a structure for the periodic table with columns and rows. There were other scientists who have worked on tabulating information of the elements even before Mendeleev, however, he was the first scientist to come up with a periodic trend to predict the properties of elements which were not…

Bitesize. Atoms and the periodic table. 2014) Gold: Au, Arsenic: As, Molybdenum: Mo, Barium: Ba, Lead: Pb, Niobium: Nb, Technetium: Tc, Rhodium: Rh, Scandium: Sc TASK 6 The periodic table distinguishes metals from nonmetals, as the metals are present on the left hand side of the…

arrangement of the elements in the periodic table (the way elements with common traits are grouped together), we will determine the name and location of each unknown element by clustering said elements with other known elements that they share the most characteristics with. In this lab we will momentarily fill the shoes of the Russian chemist Dmitri Mendeleev, who was the first to observe the patterns between elements arranged according to their properties. His periodic table left room for then…

Lithium is an element with the atomic number 3 on the periodic table. Its atomic symbol is Li. Lithium belongs in the most reactive group on the periodic table which is called alkali metal. Lithium under standard conditions is the lightest metal it is also one of the least dense solids. Lithium has an atomic mass of 6.94 and density of 0.534. Lithium is a soft silver white looking metal. Lithium melts at 357 degrees and boils at a temper of 2426 degrees. Thanks to lithium's ability to reach…

Before talking about the elements, the atom must be discussed first. Atoms are the building blocks of everything—from the structures of a building to a household pet. The idea of the atom was first suggested by Democritus, a Greek philosopher born in 460 BC. Democritus hypothesized “that atoms were indivisible and infinite in size and shape as well as firm and completely solid” and that they “existed in a void moving about combining and recombining” (European Graduate School). Later on, a…

Introduction: Dmitri Mendeleev is accredited with the creation of the periodic table but in reality, many scientists have contributed in the years leading up to the production. Before people could even write they knew some of the elements that are on the periodic table. The elements include silver, gold, copper, tin, lead, and mercury (substances that could not be broken down chemically). Not until 1649 did a man by the name of Hennig Brand discover phosphorous (an element) through…