1.1. The Periodic table is now organized on the basis of their atomic numbers, electron configurations, and recurring chemical properties.
1.2. Two scientist that impacted the development of the periodic table were Dmitri Mendeleeve published it in 1896 and a German Chemist named Johann Dobereiner who attempted to try to reorganize the elements based on their chemical and physical properties
2. Alkaline Earth Metals
2.1. Alkaline Earth Metals are reactive electropositive divalent metals, and form basic oxides that react with water to form comparatively insoluble hydroxides.
2.2. Alkaline Earth Metals are found in the second group of the periodic table.
2.3. Some examples of Alkaline Earth Metals are beryllium, magnesium strontium, barium, radium.
3. Alkali Metals
3.1. Alkali Metals are very reactive electropositive monovalent metals forming strongly alkaline hydroxides.
3.2. Alkali Metals elements are found in the first group of the periodic table.
4.1. Noble gases make a group of chemical elements with similar properties.
4.2. Noble Gases are found in group 18.
4.3. Uses of Noble gases is neon lights, welding, and space technology.
5. Transitional Metals
5.1. Transitional Metals is an element whose atom has an incomplete d sub-shell
5.2. Transitional metals are found in groups 3-12
5.3. Uses are jewelry, containers, catalyst.
6. Halogens
6.1. Halogens are reactive nonmetal elements that form strongly acidic compounds with hydrogen from which simple salts can be made.
6.2. Halogens are found in group 17 of the periodic table.
6.3. Some uses are Halogen lamps, water fluoridation/fluorides in toothpaste, Refrigerant.
7. Classification
7.1. We color-code to classify certain types of elements.
7.2. The different types of elements are metals, nonmetal, and metalloids.
7.3. Any gas element like hydrogen nitrogen, carbon and oxygen are classified as a nonmetal. Anything like copper gold or iron is classified as a metal. and elements like boron and silicon are classified as metalloids.
8. Periodic Law
8.1. Book Definition: When elements are arranged in order of increasing atomic number, there is a periodic repetition of their physical and chemical properties.
8.2. My Definition: Elements increase of atomic number makes a periodic repetition of both their physical and chemical properties
8.3. Examples: Chemicals that have similar chemical and physical properties are in the same column.
9. Inner Transitional Metals
9.1. Inner transitional metals are laboratory prepared elements that do not occur in nature.
9.2. Inner transitional metals are found in the two bottom rows of the periodic table.
9.3. Divided by lanthanides and actinides, uranium used a fuel for nuclear power plants.
