Classifying elements is necessary in order to determine their nature and the possible reactions. We can classify them according to phases: Solid, liquid and gas. Most elements in the periodic table are solid at room temperature. Some metals are liquid at or near room temperature (Hg, Fr, Ga, Cs).
Consequently, what tool is used to classify elements?
The periodic table
Likewise, what is an element type? An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron. If you change the number of protons an atom has, you change the type of element it is. These different versions of hydrogen are called isotopes.
Keeping this in view, how do you categorize the periodic table?
The elements can be broadly divided into metals, nonmetals, and semi metals. Semi metals exhibit properties intermediate between those of metals and nonmetals. Metals are located on the left of the periodic table, and nonmetals are located on the upper right. They are separated by a diagonal band of semi metals.
How many elements do we have?