(4) Each part tells a different piece of information. The atomic number tells the number of protons and electrons. The atomic mass tells the number of protons plus the number of neutrons. To find the number of neutrons you must subtract the atomic number from the rounded atomic mass. (5) A limited number of elements including, silicon, Periodic Table of Elements Notes aluminum, sodium, calcium potassium, magnesium, hydrogen, oxygen, nitrogen, and (1) The periodic of elements was first carbon dioxide. Oxygen is most abundant in the constructed in 1869 to organize the elements by Earth’s crust, oceans, and living things. Nitrogen is their properties. Today, the periodic table shows the most abundant in the Earth’s atmosphere. all 118 elements. It organizes them by the families, Most abundant element in: atomic numbers, and many other properties. Remember elements are made of pure substances Crust = only 1 kind of atom. Earth’s atmosphere = (2) Each box on the periodic table of elements contains specific information about that specific Earth’s Oceans = element. Each element is represented by a chemical symbol. Elements are different from each Living Things = other because each element has a different number of protons and sometimes neutrons. (3) Below is an example of a box from the periodic table. The parts are atomic symbol, atomic number, element name, and atomic mass. 11 Most Common Elements to the Earth Oxygen Hydrogen Nitrogen Carbon Aluminum
Periodic Table of Elements Notes (1) The periodic of elements was first constructed in 1869 to organize the elements by their properties. Today, the periodic table shows all 118 elements. It organizes them by the families, atomic numbers, and many other properties. Remember elements are pure substances made of only 1 kind of atom. (2) Each box on the periodic table of elements contains specific information about that specific element. Each element is represented by a chemical symbol. Elements are different from each other because each element has a different number of protons and sometimes neutrons. (3) Below is an example of a box from the periodic table. The parts are atomic symbol, atomic number, element name, and atomic mass. (4) Each part tells a different piece of information. The atomic number tells the number of protons and electrons. The atomic mass tells the number of protons plus the number of neutrons. To find the number of neutrons you must subtract the atomic number from the rounded atomic mass. (5) A limited number of elements including, silicon, aluminum, sodium, calcium potassium, magnesium, hydrogen, oxygen, nitrogen, and carbon dioxide. Oxygen is most abundant in the Earth’s crust, oceans, and living things. Nitrogen is the most abundant in the Earth’s atmosphere. Most abundant element in: Crust = Earth’s atmosphere = Earth’s Oceans = Living Things = 11 Most Common Elements to the Earth Oxygen Hydrogen Nitrogen Carbon Aluminum