AP Chemistry Semester 1 Final Review 2016 Basics of Chemistry: Name the following compounds BO3 H2S NaOH OF8 PCl6 HNO3 HgNO2 Write the formula for each compound Pentaboron triselenide Sulfuric Acid Carbon Monoxide Lithium Chloride How many moles are in 58.6 g of AgNO3 How many grams are in 2.5 moles of Cl2
Metal cations can be identified based on the colors they emitted off when heated in a flame.1 When atoms of the ions that were tested are excited, their electrons move up to higher levels of energy.2 When the electrons relax and return to the original states, they emit photons of specific energy creating wavelengths of light that produces colors.3 The test wire and Bunsen Burner were used to excite the solution in the crucible. The standard metal cations that were tested and their outcomes are as shown in Table 1.
Ancient scientist like Democritus and Leucippus proposed the idea of the atom(Doc.1). They were the first to start the long train of ideas and knowledge that brought us to the view of the modern atom(O.I). Since then, scientist such as John Dalton and Dmitri Mendeleyev have made huge leaps in the field of atomic science. John Dalton published the atomic theory of matter(Doc.1). Dmitri Mendeleev created the periodic table that modern scientist use daily(Doc.1).
Copper is also a very important element in the medical field. Also, the united states penny was originally made from pure copper. Finally, the Statue of Liberty did not always look green. Copper was the first element manipulated by humans. It is now, currently still a major metal industry.
Minerals 1. The minerals under the DRI for my age group would be calcium, potassium, sodium, copper ,iron, magnesium, phosphorous, selenium, and zinc. The mineral that comes below the DRI would be be potassium. However, it is not more than 80% below the DRI. However I did have a low potassium intake.
The periodic table is a basic concept of chemistry used to list and group elements. In a periodic table, chemical elements are arranged horizontally by increasing atomic number and vertically according to their chemical property similarities. No two elements are the same. Each element is unique. The Periodics as described by Isdell represent the elements of the periodic table.
4) The Stone Age was the first known period where humans began using rock and other nonmetallic materials such as bones and leather to create tools. 5) Recognized as the Old Stone Age, the Paleolithic is noted to be the time period when humans began to evolve. 6) After the
A world called Pluton, where there is gender discrimination and females are superior to the males. Growing the population is Pluton’s main purpose. Herein, having the ability to give birth is power, thus females are dominant creatures as they are created with a womb which is able to carry an infant for thirty-six weeks. The only ‘capability’ that men have is the ability of passing the sperm on to the female to bore a child. The superiority of the female is felt strongly at the workplace, home and community at large.
The Stone age consisted of the Paleolithic and Neolithic periods. The shift from the Paleolithic period to the Neolithic period is known as the Neolithic Revolution. Prior to the Revolution, people were hunter-gatherers
Dalton was best known for his work in the development of modern atomic theory. The was Dmitri organized the table was that he wrote out the elements on a card, each card has the atomic weights and were set in columns by order of the atomic weight. Each
A similarity between the two ages is that they both were able to start and use fire. Because they had fire, they could cook animal protein and get rid of diseases on food. A difference between the two ages is that Neolithic people used blades and also started to use different metals. They started using metal because it was more durable and better than animal bones and other weaker materials. This category relates to arts and sciences in PERSIAN because there was a significant change in science between these two periods.
He also created the terms “catalyst”; a substance that increases the rate of a chemical reaction, “isomer”; molecules with the same chemical formula as other molecules, and “allotropy”; the property that some elements have that allow them to exist in two different forms Dmitri Mendeleev, a Russian Chemist: 1834-1907, he formulated the period table, which he then used to predict the properties of 8 elements yet to be discovered. He also used his version of the periodic table to correct some properties of existing elements Joseph John Thomson, an English Physicist: 1856-1940, researched the cathode ray; streams of electrons observed in vacuum tubes, which led him into discovering the
INTRODUCTION Water is a transparent and nearly colorless chemical substance that is the main constituent of Earth 's streams, lakes, and oceans, and the fluids of most living organisms. Water plays an important role in the world economy. Approximately 70% of the freshwater used by humans goes to agriculture. Fishing in salt and fresh water bodies is a major source of food for many parts of the world.
The Stone Age is known to be the first prehistoric human culture defined by the use of stone tools. It is divided by 3 separate periods, the Paleolithic period, Mesolithic period, and the Neolithic period, the origin of the stone age coincides with the discovery of the oldest stone tools, which had been dated 3.3 million years ago. It went on until the time of smelting. Smelting allowed people to create tools, made from metal and stone. Most of the tools that were made, were created to help humans survive.