Question

fill in the blank question arranging elements by atomic always puts them in the correct order based on properties, but arranging them by atomic puts some elements out of order. need help? review these concept resources. read about the concept

Explanation:

In chemistry, arranging elements by atomic number correctly orders them according to their properties. Arranging by atomic mass can sometimes put elements out - of - order due to factors like isotopes.

Answer:

number; mass