Group 1 Lab Report

The three elements that I will be looking at are Krypton, Arsenic, and Potassium. These elements are all very different but share some similarities even with their separate placement on the periodic table. I chose these elements because they are the most different of the six elements that I chose to do this project on. Arsenic is the first element we will be looking at. Arsenic is a metalloid because it shares some characteristics with metals and some with nonmetals.

The purpose of this experiment was to classify unknown solids based on their type of chemical bonds by investigating their properties. By using data, Unknown 1 was classified as a metallic. This was because it appeared a shiny copper color, had a very high conductivity as a solid, had a high melting point, and was malleable. Unknown 2 was classified as a nonpolar covalent bond. This was because it had no conductivity as a solid and low conductivity in water.

These different elements

Nonmetallic properties tend to predominate for elements at the far right portion of the table.

Density is mass divided by volume and the measurement of how compact something is. Melting point is when the element goes from solid to a liquid and boiling point is when the element goes from a liquid to a gas. For example for density, if you look at group 4 you can go down the column and see that it goes from lowest to highest density. You can also go down from the third row and see that the density in a irregular trend. It is the same for the melting point and boiling because they might a group the shows a clear trend and another group that shows a irregular trend. This demonstrates that these three are quasi periodic trends because in the groups or rows they regular and irregular trends. These trends are quasi

When metal atoms pack together in a specific and orderly fashion metals such as gold, silver, and copper are produced. Each metallic atom gave up its valence electron to form a common pool of electrons in the entire structure. The freedom of valence electrons to

Chemistry is composed of many molecules and changes of properties in the matter of science. The elements on the periodic table arranged from metal to non metals, plays an important role when it comes to making a compound and mixture. Each of the element have their own unique atomic mass which matters when it comes to organizing the periodic table and when there is a calculation. There are lots of importance about the atomic mass of each element that will be discussed later in this essay. An experiment performed using the mass of zinc and copper has determined whether which element have excess remaining. Will there be a difference if an alkali metal was used?

Chesick, pg 390, para. 5,). The melting points of different substances vary. The melting point of a substance depends on the whether the substance is a pure substance or a mixture.

Example, diamond - physical properties entail shape, size, weight. But features such as color, glitter, and hardness properties of the relations between the diamond and other things.

According to Silver (n.d.), the characteristics of silver is that it is a soft, white metal that occurs in nature in four forms. The first form is as a native element. The second is as a primary component in silver materials. The third is as a natural alloy with other metals. The fourth is as a trace to minor components in

Zinc oxide is not combustible because it absorbs carbon dioxide from the air and forms zinc carbonates.

Only barely enough Americium has been produced to know a few of its properties. Some of the physical properties that it has are basic properties. It is a shiny silvery-white color and is very radioactive. Americium has few chemical properties. For example, at room temperature Americium is a solid, but it tarnishes slowly in dry air. Its melting point is

physical property to identify an unknown substance. An example of a physical property is the

Some physical properties are its greenish-yellow color (only is gas form). Its disagreeable, suffocating smell, solubility in water, and a boiling point of -34.05°C. It also has a melting point of -101°C, a density of 3.214 g/l, and a gravity of -33.6°C. These properties are physical and not chemical because when observed, they do not change the chemical makeup of that matter (in this case chlorine). The properties are also easily observed with the 5 senses. But how does chlorine get its physical properties? Chlorine gets its properties from the number of protons in the nucleus. Different elements have different numbers of protons, which means they have different chemical/physical

Boron is one of the many elements on the periodic table. Its atomic number is five and its symbol is the letter B. Boron’s atomic weight is 10.811. It is a solid at room temperature. The group number for Boron is 13 and the periodic number for Boron is 2. It is also in the p block. Its element category is a metalloid. Boron came from the Arabic word Buraq and the Persian word Burah, which are both meanings for the material called “Borax.” Boron is a tough element – very hard, and very resistant to heat. In its crystalline form it is the second hardest of all the elements on the mohs scale – only carbon (diamond) is harder. Only 11 elements have higher melting points than boron: these are C, W, Re, Os, Ta, Mo, Nb, Ir, Ru, Hf, and Tc.