What is the Periodic Table of The Elements?
The periodic table is the most important chemistry reference there is. It arranges all the known elements in an informative array. Elements are arranged left to right and top to bottom in order of increasing atomic number. Order generally coincides with increasing atomic mass. The different rows of elements are called periods. The period number of an element signifies the highest energy level an electron in that element occupies (in the unexcited state). The number of electrons in a period increases as one traverses down the periodic table; therefore, as the energy level of the atom increases, the number of energy sub-levels per energy level increases. Using the data in the table scientists, students, and others that are familiar with the periodic table can extract information concerning individual elements. For instance, a scientist can use carbon’s atomic mass to determine how many carbon atoms there are in a 1 kilogram block of carbon.
The periodic table of elements is an arrangement of all the known chemical elements in such as way as to reveal the periodic repetition of shared properties, which were discovered in 1869 by Dmitry Ivanovich Mendeleev, a Russian chemist. Mendeleev was part of a group of international chemists working to establish the atomic weights of the sixty-four elements that were known at that time. The genius of Mendeleev’s arrangement of the research results was to not only show the sequence of atomic weights in the horizontal dimension, but to also reveal groupings of elements with similar chemical properties in vertical alignment. It is this arrangement that yields the name period table of elements. As new elements have been discovered, the periodic table has grown to the point that in 2007 it included 118 elements. The most recent discovery at that time was that of Unonoctiumn — a temporary name which is Latin for its number — which was artificially produced in 2002 and 2005.
A.”It is a huge, efficient resource!” The periodic table is the most important chemistry reference there is. It arranges all the known elements in an informative array. Elements are arranged left to right and top to bottom in order of increasing atomic number.. This order generally coincides with increasing atomic mass The different rows of elements are called periods. The period number of an element signifies the highest energy level an electron in that element occupies (in the unexcited state). The number of elements in a period increases as one traverses down the periodic table because as the energy level of the atom increases, the number of energy sub-levels per energy level increases. Using the data in the table scientists, students, and others that are familiar with the periodic table can extract information concerning individual elements. For instance, a scientist can use carbon’s atomic mass mass to determine how many carbon atoms there are in a 1 kilogram block of carbon. Peop
The periodic table is the most important chemistry reference there is. It arranges all the known elements in an informative array. Elements are arranged left to right and top to bottom in order of increasing atomic number. This order generally coincides with increasing atomic mass. The different rows of elements are called periods. The period number of an element signifies the highest energy level an electron in that element occupies (in the unexcited state). The number of elements in a period increases as one traverses down the periodic table because as the energy level of the atom increases, the number of energy sub-levels per energy level increases.
The periodic table of the elements arranges all the known elements in an informative array. 2. Elements in periodic table are arranged left to right and top to bottom in order of increasing ______ ________ atomic number, which generally coincides with increasing atomic mass. 3. The different rows of elements are called _______ periods. 4. The different columns of elements are called _______ groups. 5. The Periodic Law states that; the properties of individual elements are a _______ _______ periodic function of their atomic numbers. 6. The first periodic table was created in 1869 by __________ Mendeleev. 7. What is the atomic number of an atom? The number of protons in an atoms nucleus. 8. What is the atomic mass of an atom? The sum of the number of protons and neutrons in an atoms nucleus. 9. What is different about an isotope of an atom? An isotope of an element has a different mass number, based on a different amount of neutrons in the atoms nucleus. 10. Do the various isotopes of an
