Question

3

Answer 1

Answer:

(1) atomic numbers

Explanation:

The observed regularities in the properties of the elements on the periodic table are periodic functions of their atomic numbers.

• Atomic number is the number of protons in an atom.
• The periodic law states that "the properties of elements are a periodic function of their atomic number".
• Elements on the periodic table are arranged based on the atomic numbers they contain.
• The number of positively charged particles in an atom is the atomic number.