Question

the modern periodic table is arranged in order of increasing atomic

o charge

o mass

o radius

o number

Explanation:

The modern periodic table is organized based on the atomic number. The atomic number represents the number of protons in an atom's nucleus. This arrangement helps in systematically classifying elements and understanding their properties. Atomic charge is related to the gain or loss of electrons (ions), atomic mass is the weighted average of an element's isotopes, and atomic radius is a measure of the size of an atom. But the fundamental organizing principle of the modern periodic table is atomic number.

Answer:

number