How to find group number and period for an atom with example

Sure, here's how you can find the group number and period for an atom:

1. Identify the atom: First, you need to identify the atom you are interested in. For example, let's take the atom of Oxygen.

2. Refer to the Periodic Table: The Periodic Table of Elements is a tabular arrangement of chemical elements, organized based on their atomic number, electron configuration, and recurring chemical properties. Elements are listed in order of increasing atomic number, which corresponds to the number of protons in an atom's atomic nucleus.

3. Find the atom on the Periodic Table: Locate the symbol for Oxygen (O) on the Periodic Table.

4. Identify the group number: The group number of an element can be identified by the topmost number of the column in which the element is located. In the modern periodic table, the group number for Oxygen is 16. However, in some versions of the periodic table, the groups are labeled from 1 to 18, so Oxygen would be in group 6.

5. Identify the period: The period number of an element corresponds to the horizontal row in which the element is located. Oxygen is in the second period of the Periodic Table.

So, for Oxygen, the group number is 16 (or 6 in some versions of the Periodic Table) and the period is 2.