Question

In the modern periodic table, elements are arranged in order

based on the number of in the nuclei of their atoms.

Answer 1

In the modern periodic table, the elements are listed in order of increasing atomic number. The atomic number is the number of protons in the nucleus of an atom. The number of protons define the identity of an element (i.e., an element with 6 protons is a carbon atom, no matter how many neutrons may be present).

Step-by-step explanation:

Answer 2

Answer:Protons

Explanation: Just got it right on the CK-12 assignment :)