It is a way to display to number of for elements. This chart will show the correlation between number and the number of valence electrons

Electrons

Atomic number

Explanation:

The question describes a period table which is a chart of the elements.

The Periodic Table of elements shows the arrangement of elements based on their increasing atomic number.

In a neutral atom, the number of electrons will equal the number of protons, so we can easily determine electron number from atomic number. In addition, the position of an element in the periodic table—its column, or group, and row, or period—provides useful information about how those electrons are arranged (electronic configuration) in their different shells.

It is a way to display to number of electrons for elements. This chart will show the correlation between __atomic number and the number of valence electrons

measuring things 1 litre of water