Structure of the modern periodic
table.
Answers
Answer:
Structure of the Modern Periodic Table
The Modern Periodic Table is arranged in order of increasing atomic number, which is the number of protons in the nucleus of an atom. The lightest atom is Hydrogen, in the upper left-hand corner, with an atomic number of 1. This means that hydrogen contains only 1 proton in its nucleus. The heaviest naturally occurring element is Uranium, with an atomic number of 92. The major difference between hydrogen and uranium is the number of protons in their nuclei. The heaviest human-made element is atomic number 118, UUo, known as Ununoctium (from its atomic number “one” “one” “oct,” or eight.). UUo’s discovery (or creation) was announced on October 9, 2006, as a result of collisions between californium-249 atoms and calcium-48 ions. It is believed to be a semi-conducting noble gas.
The Periodic Table consists of rows and columns. The rows are called Periods and denote energy levels of the elements’ outermost electrons. For instance, both hydrogen and helium have their outermost (and only) electrons in the first energy level, which is why they are in the first row the Periodic Table. The second row elements lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine and neon, each have their outermost electrons in the second energy level, and so on. This is a general rule for each element in a row, but there are notable exceptions which will be discussed later.
The columns are called Groups or Chemical Families. All elements in a a given column or group share similar chemical properties. All the elements in the far-right column are the Noble Gases. These gases generally do not react with other elements.
periodic-table-large
Explanation:
The periodic table, also known as the periodic table of elements, is a tabular display of the chemical elements, which are arranged by atomic number, electron configuration, and recurring chemical properties. The structure of the table shows periodic trends.