Mendeleev's proposal of periodic table was based on:

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

Find the mass in grams of 1.37x1020 particles of h3po4

Which of these statements explains the difference between nuclear binding energy and the strong nuclear force ?