periodic table

 what is a periodic table 

The periodic table is organized like a big grid. Each element is placed in a specific location because of its atomic structure. As with any grid, the periodic table has rows (left to right) and columns (up and down). Each row and column has specific characteristics. For example, magnesium (Mg) and calcium(Mg) are found in column two and share certain similarities while potassium (K) and calcium (Ca) from row four share different characteristics. Magnesium and sodium (Na) also share qualities because the are in the same period (similar electron configurations). 

why do we use a periodic table 

The table is useful for modern students and scientists because it helps predict the types of chemical reactions that are likely for an element. Rather than memorize facts and figures for each element, a quick glance at the table reveals a lot about the reactivity of an element, whether it is likely to conduct electricity, whether it is hard or soft, and many other characteristics.

electron arangements 

The number of protons in the atom of an element determines its place in the Periodic Table. The number of electrons in an atom is the same as the number of protons. These electrons are arranged in shells or 'energy levels' around the nucleus. The arrangement of electrons determines the chemical properties of an element.

 my periodic table