atoms in the same column on the periodic table have?

Atoms in the same column on the periodic table have similar chemical properties. This is because they belong to the same group or family. One way to determine the number of atoms in the same column on the periodic table is to look at the group number. Each element in a group has the same number of valence electrons, which are the outermost electrons involved in chemical bonding.

To find the number of atoms in the same column, follow these steps:

1. Locate the element you are interested in on the periodic table.
2. Identify the group number of that element. Group numbers are usually displayed above each column on the periodic table.
3. All elements in the same group as the one you selected will have the same number of atoms in the same column.

For example, if you are looking at the 17th group (also known as Group 7A or Group 17) on the periodic table, elements such as fluorine, chlorine, bromine, iodine, and astatine are found in this group. These elements have similar chemical properties because they all have seven valence electrons.

Therefore, atoms in the same column on the periodic table have similar chemical properties due to the shared number of valence electrons, which is determined by their group number.