Question

Name the metal(s) and non-metals in the first twenty elements.

Answer 1

: Elements are arranged in the periodic table such that all the elements are in an informative manner. There are $118$ elements in the periodic table. Elements are arranged such that the left part contains metals, the middle part contains metalloids and the right part of the periodic table contains non-metals.

Complete step-by-step answer: First, we will understand some basic terms of chemistry starting with the periodic table. The periodic table is the table containing chemical elements which are arranged in the order of increasing atomic number usually in rows and columns. This table is used and created to provide summarized and organized data to deal with the physical and chemical properties of chemical elements with their symbols.
Now we will discuss the first twenty elements in the periodic table. We know that the metals are on the left of the line except for hydrogen which is considered non-metal. On the other hand, the non-metals are to the upper right of the periodic table separated by metalloids. Now we will separate metals and non-metals from the first twenty elements. So the metals and non-metals are as follows:
Metals in the first twenty elements are Lithium, Beryllium, Sodium, magnesium, Aluminum, Potassium, and calcium. Now the non-metals in the first twenty elements are Hydrogen, Helium, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Phosphorous, Sulphur, Chlorine, and Argon. So, here we have the metals and non-metals in the first twenty elements.

Note: There are $18$ groups and $7$ periods in the modern periodic table. From the following trends, the metallic character of elements increases down the group and the non-metallic character increases from left to right in the period and vice-versa.