Task 1a Periodic Table Essay

The students created a macroscopic, three-dimensional (3D) model of several properties of the periodic table. They explained in their own words the following terms: atomic radii, ionic radii, first ionization energy, and electronegativity. Lastly, they identified, described, and explained the patterns observed in the 3D periodic tables for the following element properties: atomic radii, ionic radii, first ionization energy, and electronegativity.

The chemical properties of group 1: all the elements in the group one have only one electron which happens to be outer energy level. However group one are white solids and this means that they will easily dissolve in water. In addition group one are all on the left side of the periodic table which means that they are all alkali and alkali metals form alkaline compounds. However this will mean that all the metals have similar properties to one on other.

As more electrons are added the distance will increase which cause atomic radius to change.

chemical element here on our own planet Earth. Though it is a rare, unreactive noble gas,

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

In this lab, students compared the periodic trends of the elements in comparison to the atomic number. A periodic trend is the tendency of certain properties of the elements to increase or decrease as one progresses along a row or column of the periodic table. The periodic table is arranged in such a way that these trends are easy to compare, which is the purpose of this lab. One trend, for example, is between the electronegativity and the atomic number on an element, another being the density. When comparing the trends, notice that electronegativity decreases when going down the groups, or columns, of the period table, whereas the density increases.

Multiple forms of the same element that have the same amount of protons but different number of neutrons in their nuclei.

When Newlands first made his interpretation of the table, he did not have all of the elements figured out simply because not all of the elements that are known today were discovered at the time. He believed the table looked incorrect due to the empty spaces portrayed throughout the periodic table, so he made up some elements and atomic numbers for these fictional elements. In addition, he misplaced the elements for the public even though he knew they were not appropriately placed in order to cover up the holes in the table. " Regular repeats Newlands' table showed a repeating or periodic pattern of properties, but it had problems. For example, he put iron in the same group as oxygen and sulphur, which are two non-metals.

The periodic table is a table that categorises and displays all of the chemical elements. It is made up of groups, periods and blocks. A group (also referred to as a family) are the columns of elements, there are 8 groups. The elements in each family have similar but not identical properties and they all have the same number of outer electrons. E.g. lithium (Li), sodium (Na), potassium (K) are all soft, white, shiny metals because they are all members of group 1. A period is each horizontal row of elements, there are 7 periods. In a period, the elements are not alike in properties, the first element in a period is always an extremely active solid, and the last element in a period is always an inactive gas. Properties change greatly across a given row. Each new period represents the next shell which electrons fill. A block is a region of the periodic, there are 4 blocks: S, D, P and F.

Hi I’m Calcium I have 20 protons, 20 electrons, and 20 neutrons. My atomic number is 20 and my atomic mass number is 40. My number of electrons in energy level is 20 and my energy level number is 20. Also the period number I belong in for the periodic table is 4. The discovery name is Humphry Davy and he was the one that made me. The year that I was discovered was 1808 and the country they decided to discover me was in England. My element symbol is Ca.

You must have a picture that shows the structure of the element (number of protons, neutrons, and electrons) and the shell pattern of the electrons.

Standard state: solid at 293 K Color: silvery white/gray Classification: Metallic Lithium is a Group 1 (IA) element containing just a single valence electron (1s22s1). Group 1 elements are called "alkali metals". Lithium is a solid only about half as dense as water.

In the Quantum Free Electron Theory the electrons are considered as waves, so the electrons will have much similar behaviour to waves. The temperature is related to the heat capacitance. So each element will have different heat capacitance.

The three dimensional or geometrical arrangement of molecules or atoms as points in a specific form in space is called a crystal lattice. The smallest unit of a crystal lattice is called a unit cell. A unit cell is the smallest repeating unit of a crystal. The unit cells have different structures. These arrangements are also called Bravais

Now we will move onto other materials that are involved with electronics. The next group of materials that will be discussed are insulators. An insulator is a material that does not conduct electricity at all but will resist or stop it from traveling further. An insulating atom has eight electrons in its valance shell which makes this shell complete. Eight is the most electrons that any atoms can have in their valance shell this is why these are called insulators, no more electrons can fit in the valance shell of these atoms.