Grouping Elements with Similar Chemical Properties Together

1-1: Insert the chemical symbol in the answer blank for each of the following elements.

When you name compounds the first element is usually called the same as the element's name like magnesium or iron. The second element usually has the -ide ending except when you use the prefixes. Some names end in ite or ate when you have a polyatomic. This is why MgBr2 is magnesium bromide, but it could also be called magnesium dibromide. This also explains why some compounds use di- and tri- prefixes, such as carbon disulfide and dinitrogen pentoxide. Roman numberals are needed when you have transitional metals in the compound because all transitional metals can have different charges, so you have to memorize them or you can look at the periodical table to see the group numbers which are equal to the charges so then you put the charges into

The experiment is to observe a variety of chemical reactions and to identify patterns in

3. Examine the luster of the minerals in Figure 1.2 (p. 4 lab book). Place the letter A, B, C, D, or E in

38. When naming binary ionic compounds, write the name of the positive ion (cation) first,

Explain how scientific observations led to the development of, and changes to, the periodic table.

If all atoms want to have 8 electrons on their outer shell, what should happen between Na and Cl for each atom to reach that state of having 8 valence electrons?

Introduction: The purpose of this lab was to find the relative solubilities of some salts of the Alkaline Earths and use that information to find the order which they appear in the periodic table; also use that information to efficiently find an unknown alkaline earth halide. Also to find the relative oxidizing powers of the Halogens given and using that information finding the order of the Halogens in the periodic table; also use that information to efficiently find an unknown Halogen.

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.

Additionally, Johann Dobereiner began grouping elements with like properties into triads – groups of 3 elements – between 1817 and 1829. His work began in 1817 after he noticed that the atomic weight of Strontium (Sr) was medially between the atomic weights of calcium and

symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between

Though there are over a hundred different elements, each one is unique in its complexity and properties. Helium has an atomic Number of two, that’s how you can tell it it has two positively charged atoms, or ‘protons’, in

The Element: Chlorine General Information We researched the chemical element known as chlorine. Chlorine has an atomic number of 17 and an atomic weight of 35.453. It has a valence number of 3. The element has 3 energy levels. Chlorine exists as a greenish-yellow gas at normal temperatures and pressures.

My element is Silver. The atomic number of silver (Ag) is 47. Silver is in group 11 and period 5. The mass number of Silver is 107, and its electron configuration is [Kr] 4d^10 5s^1. Silver was one of the first five metals discovered and used by humans. Silver’s melting point is 1,763.2 degrees fahrenheit. Silver is commonly used to make mirrors, as it's the best known reflector of light. Silver is also commonly in silverware, where the appearance is important. Silver is most commonly used in jewelry, where sterling silver is 92.5% silver.

My element is Cadmium whose chemical symbol is Cd. Its atomic number is 48. The average atomic mass for cadmium is 112.411 atomic mass units. It contains 48 protons and electrons, as well as 64 neutrons. Cadmium has nine stable isotopes. The nine